23897857 has 2 divisors, whose sum is σ = 23897858. Its totient is φ = 23897856.

The previous prime is 23897837. The next prime is 23897899. The reversal of 23897857 is 75879832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14753281 + 9144576 = 3841^2 + 3024^2 .

It is a cyclic number.

It is not a de Polignac number, because 23897857 - 2¹⁵ = 23865089 is a prime.

It is a super-2 number, since 2×23897857² = 1142215138384898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23897857.

It is not a weakly prime, because it can be changed into another prime (23897837) 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 as a sum of consecutive naturals, namely, 11948928 + 11948929.

It is an arithmetic number, because the mean of its divisors is an integer number (11948929).

Almost surely, 2^23897857 is an apocalyptic number.

It is an amenable number.

23897857 is a deficient number, since it is larger than the sum of its proper divisors (1).

23897857 is an equidigital number, since it uses as much as digits as its factorization.

23897857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 49.

The square root of 23897857 is about 4888.5434436036. The cubic root of 23897857 is about 288.0401218858.

The spelling of 23897857 in words is "twenty-three million, eight hundred ninety-seven thousand, eight hundred fifty-seven".