23389987 has 2 divisors, whose sum is σ = 23389988. Its totient is φ = 23389986.

The previous prime is 23389963. The next prime is 23389991. The reversal of 23389987 is 78998332.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23389987 - 2⁷ = 23389859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23389987.

It is not a weakly prime, because it can be changed into another prime (23389187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11694993 + 11694994.

It is an arithmetic number, because the mean of its divisors is an integer number (11694994).

Almost surely, 2^23389987 is an apocalyptic number.

23389987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23389987 is an equidigital number, since it uses as much as digits as its factorization.

23389987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 49.

The square root of 23389987 is about 4836.3195717405. The cubic root of 23389987 is about 285.9850473869.

The spelling of 23389987 in words is "twenty-three million, three hundred eighty-nine thousand, nine hundred eighty-seven".