23913187 has 2 divisors, whose sum is σ = 23913188. Its totient is φ = 23913186.

The previous prime is 23913181. The next prime is 23913223. The reversal of 23913187 is 78131932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23913187 - 2³ = 23913179 is a prime.

It is not a weakly prime, because it can be changed into another prime (23913181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11956593 + 11956594.

It is an arithmetic number, because the mean of its divisors is an integer number (11956594).

Almost surely, 2^23913187 is an apocalyptic number.

23913187 is a deficient number, since it is larger than the sum of its proper divisors (1).

23913187 is an equidigital number, since it uses as much as digits as its factorization.

23913187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 23913187 is about 4890.1111439312. Note that the first 4 decimals coincide. The cubic root of 23913187 is about 288.1016993907.

The spelling of 23913187 in words is "twenty-three million, nine hundred thirteen thousand, one hundred eighty-seven".