23387257 has 16 divisors (see below), whose sum is σ = 25579152. Its totient is φ = 21299200.

The previous prime is 23387213. The next prime is 23387263. The reversal of 23387257 is 75278332.

It can be written as a sum of positive squares in 8 ways, for example, as 14017536 + 9369721 = 3744^2 + 3061^2 .

It is a cyclic number.

It is not a de Polignac number, because 23387257 - 2¹⁵ = 23354489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23387057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90873 + ... + 91129.

It is an arithmetic number, because the mean of its divisors is an integer number (1598697).

Almost surely, 2^23387257 is an apocalyptic number.

It is an amenable number.

23387257 is a deficient number, since it is larger than the sum of its proper divisors (2191895).

23387257 is a wasteful number, since it uses less digits than its factorization.

23387257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its digits is 70560, while the sum is 37.

The square root of 23387257 is about 4836.0373240909. The cubic root of 23387257 is about 285.9739205522.

The spelling of 23387257 in words is "twenty-three million, three hundred eighty-seven thousand, two hundred fifty-seven".