23111887 has 2 divisors, whose sum is σ = 23111888. Its totient is φ = 23111886.

The previous prime is 23111867. The next prime is 23111897. The reversal of 23111887 is 78811132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23111887 - 2²³ = 14723279 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 (23111807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11555943 + 11555944.

It is an arithmetic number, because the mean of its divisors is an integer number (11555944).

Almost surely, 2^23111887 is an apocalyptic number.

23111887 is a deficient number, since it is larger than the sum of its proper divisors (1).

23111887 is an equidigital number, since it uses as much as digits as its factorization.

23111887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 31.

The square root of 23111887 is about 4807.4823972637. The cubic root of 23111887 is about 284.8470996818.

The spelling of 23111887 in words is "twenty-three million, one hundred eleven thousand, eight hundred eighty-seven".