153403 has 4 divisors (see below), whose sum is σ = 154440. Its totient is φ = 152368.

The previous prime is 153379. The next prime is 153407. The reversal of 153403 is 304351.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 304351 = 17 ⋅17903.

It is a cyclic number.

It is not a de Polignac number, because 153403 - 2⁵ = 153371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250 + ... + 607.

It is an arithmetic number, because the mean of its divisors is an integer number (38610).

2¹⁵³⁴⁰³ is an apocalyptic number.

153403 is a deficient number, since it is larger than the sum of its proper divisors (1037).

153403 is an equidigital number, since it uses as much as digits as its factorization.

153403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 153403 is about 391.6669503545. Note that the first 3 decimals coincide. The cubic root of 153403 is about 53.5317306747.

Adding to 153403 its reverse (304351), we get a palindrome (457754).

The spelling of 153403 in words is "one hundred fifty-three thousand, four hundred three".