23118287 has 2 divisors, whose sum is σ = 23118288. Its totient is φ = 23118286.

The previous prime is 23118253. The next prime is 23118299. The reversal of 23118287 is 78281132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23118287 - 2¹⁶ = 23052751 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23118217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11559143 + 11559144.

It is an arithmetic number, because the mean of its divisors is an integer number (11559144).

Almost surely, 2^23118287 is an apocalyptic number.

23118287 is a deficient number, since it is larger than the sum of its proper divisors (1).

23118287 is an equidigital number, since it uses as much as digits as its factorization.

23118287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 32.

The square root of 23118287 is about 4808.1479802519. The cubic root of 23118287 is about 284.8733899509.

The spelling of 23118287 in words is "twenty-three million, one hundred eighteen thousand, two hundred eighty-seven".