23977000987 has 2 divisors, whose sum is σ = 23977000988. Its totient is φ = 23977000986.

The previous prime is 23977000903. The next prime is 23977001003. The reversal of 23977000987 is 78900077932.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23977000987 is a prime.

It is not a weakly prime, because it can be changed into another prime (23987000987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11988500493 + 11988500494.

It is an arithmetic number, because the mean of its divisors is an integer number (11988500494).

Almost surely, 2^23977000987 is an apocalyptic number.

23977000987 is a deficient number, since it is larger than the sum of its proper divisors (1).

23977000987 is an equidigital number, since it uses as much as digits as its factorization.

23977000987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1333584, while the sum is 52.

The spelling of 23977000987 in words is "twenty-three billion, nine hundred seventy-seven million, nine hundred eighty-seven", and thus it is an aban number.