87896779 has 2 divisors, whose sum is σ = 87896780. Its totient is φ = 87896778.

The previous prime is 87896771. The next prime is 87896807. The reversal of 87896779 is 97769878.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87896779 - 2³ = 87896771 is a prime.

It is not a weakly prime, because it can be changed into another prime (87896771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43948389 + 43948390.

It is an arithmetic number, because the mean of its divisors is an integer number (43948390).

Almost surely, 2^87896779 is an apocalyptic number.

87896779 is a deficient number, since it is larger than the sum of its proper divisors (1).

87896779 is an equidigital number, since it uses as much as digits as its factorization.

87896779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 61.

The square root of 87896779 is about 9375.3282075883. The cubic root of 87896779 is about 444.6220398840.

The spelling of 87896779 in words is "eighty-seven million, eight hundred ninety-six thousand, seven hundred seventy-nine".