340240453 has 4 divisors (see below), whose sum is σ = 388846240. Its totient is φ = 291634668.

The previous prime is 340240423. The next prime is 340240471. The reversal of 340240453 is 354042043.

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 a cyclic number.

It is not a de Polignac number, because 340240453 - 2⁹ = 340239941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340240423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24302883 + ... + 24302896.

It is an arithmetic number, because the mean of its divisors is an integer number (97211560).

Almost surely, 2^340240453 is an apocalyptic number.

It is an amenable number.

340240453 is a deficient number, since it is larger than the sum of its proper divisors (48605787).

340240453 is an equidigital number, since it uses as much as digits as its factorization.

340240453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48605786.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 340240453 is about 18445.6079596201. The cubic root of 340240453 is about 698.1177001759.

Adding to 340240453 its reverse (354042043), we get a palindrome (694282496).

The spelling of 340240453 in words is "three hundred forty million, two hundred forty thousand, four hundred fifty-three".