453 has 4 divisors (see below), whose sum is σ = 608. Its totient is φ = 300.
The previous prime is 449. The next prime is 457. The reversal of 453 is 354.
453 is an esthetic number in base 3, because in such base its adjacent digits differ by 1.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is an interprime number because it is at equal distance from previous prime (449) and next prime (457).
It is not a de Polignac number, because 453 - 22 = 449 is a prime.
It is a D-number.
It is a Duffinian number.
It is a Curzon number.
It is a plaindrome in base 13 and base 14.
It is a nialpdrome in base 9.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (457) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73 + ... + 78.
It is an arithmetic number, because the mean of its divisors is an integer number (152).
It is an amenable number.
453 is a deficient number, since it is larger than the sum of its proper divisors (155).
453 is a wasteful number, since it uses less digits than its factorization.
453 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 154.
The product of its digits is 60, while the sum is 12.
The square root of 453 is about 21.2837966538. The cubic root of 453 is about 7.6800857195.
Adding to 453 its sum of digits (12), we get a triangular number (465 = T30).
Subtracting from 453 its sum of digits (12), we obtain a square (441 = 212).
Subtracting from 453 its product of digits (60), we obtain a palindrome (393).
Subtracting from 453 its reverse (354), we obtain a palindrome (99).
It can be divided in two parts, 4 and 53, that multiplied together give a palindrome (212).
The spelling of 453 in words is "four hundred fifty-three", and thus it is an aban number.
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