23649157 has 4 divisors (see below), whose sum is σ = 27027616. Its totient is φ = 20270700.

The previous prime is 23649149. The next prime is 23649209. The reversal of 23649157 is 75194632.

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 23649157 - 2³ = 23649149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23649127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1689219 + ... + 1689232.

It is an arithmetic number, because the mean of its divisors is an integer number (6756904).

Almost surely, 2^23649157 is an apocalyptic number.

It is an amenable number.

23649157 is a deficient number, since it is larger than the sum of its proper divisors (3378459).

23649157 is an equidigital number, since it uses as much as digits as its factorization.

23649157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3378458.

The product of its digits is 45360, while the sum is 37.

The square root of 23649157 is about 4863.0398929065. The cubic root of 23649157 is about 287.0374444785.

The spelling of 23649157 in words is "twenty-three million, six hundred forty-nine thousand, one hundred fifty-seven".