23257687 has 4 divisors (see below), whose sum is σ = 23295880. Its totient is φ = 23219496.

The previous prime is 23257673. The next prime is 23257693. The reversal of 23257687 is 78675232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23257687 - 2¹⁵ = 23224919 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 (23257607) 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, 18168 + ... + 19405.

It is an arithmetic number, because the mean of its divisors is an integer number (5823970).

Almost surely, 2^23257687 is an apocalyptic number.

23257687 is a deficient number, since it is larger than the sum of its proper divisors (38193).

23257687 is an equidigital number, since it uses as much as digits as its factorization.

23257687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38192.

The product of its digits is 141120, while the sum is 40.

The square root of 23257687 is about 4822.6224193897. The cubic root of 23257687 is about 285.4448250077. Note that the first 3 decimals are identical.

The spelling of 23257687 in words is "twenty-three million, two hundred fifty-seven thousand, six hundred eighty-seven".