23573987 has 2 divisors, whose sum is σ = 23573988. Its totient is φ = 23573986.

The previous prime is 23573971. The next prime is 23573989. The reversal of 23573987 is 78937532.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23573987 - 2⁴ = 23573971 is a prime.

Together with 23573989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23573989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11786993 + 11786994.

It is an arithmetic number, because the mean of its divisors is an integer number (11786994).

Almost surely, 2^23573987 is an apocalyptic number.

23573987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23573987 is an equidigital number, since it uses as much as digits as its factorization.

23573987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 44.

The square root of 23573987 is about 4855.3050367613. The cubic root of 23573987 is about 286.7330008441.

The spelling of 23573987 in words is "twenty-three million, five hundred seventy-three thousand, nine hundred eighty-seven".