23393987 has 2 divisors, whose sum is σ = 23393988. Its totient is φ = 23393986.

The previous prime is 23393971. The next prime is 23394029. The reversal of 23393987 is 78939332.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23393987 - 2⁴ = 23393971 is a prime.

It is not a weakly prime, because it can be changed into another prime (23393957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11696993 + 11696994.

It is an arithmetic number, because the mean of its divisors is an integer number (11696994).

Almost surely, 2^23393987 is an apocalyptic number.

23393987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23393987 is an equidigital number, since it uses as much as digits as its factorization.

23393987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 44.

The square root of 23393987 is about 4836.7330916642. The cubic root of 23393987 is about 286.0013488779.

The spelling of 23393987 in words is "twenty-three million, three hundred ninety-three thousand, nine hundred eighty-seven".