87720659627 has 2 divisors, whose sum is σ = 87720659628. Its totient is φ = 87720659626.

The previous prime is 87720659513. The next prime is 87720659633. The reversal of 87720659627 is 72695602778.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87720659627 - 2²⁰ = 87719611051 is a prime.

It is not a weakly prime, because it can be changed into another prime (87720659687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43860329813 + 43860329814.

It is an arithmetic number, because the mean of its divisors is an integer number (43860329814).

Almost surely, 2^87720659627 is an apocalyptic number.

87720659627 is a deficient number, since it is larger than the sum of its proper divisors (1).

87720659627 is an equidigital number, since it uses as much as digits as its factorization.

87720659627 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17781120, while the sum is 59.

The spelling of 87720659627 in words is "eighty-seven billion, seven hundred twenty million, six hundred fifty-nine thousand, six hundred twenty-seven".