87085779 has 16 divisors (see below), whose sum is σ = 127905024. Its totient is φ = 52264800.

The previous prime is 87085771. The next prime is 87085807. The reversal of 87085779 is 97758078.

It is not a de Polignac number, because 87085779 - 2³ = 87085771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87085771) 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 in 15 ways as a sum of consecutive naturals, for example, 9412 + ... + 16209.

It is an arithmetic number, because the mean of its divisors is an integer number (7994064).

Almost surely, 2^87085779 is an apocalyptic number.

87085779 is a deficient number, since it is larger than the sum of its proper divisors (40819245).

87085779 is a wasteful number, since it uses less digits than its factorization.

87085779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25738.

The product of its (nonzero) digits is 987840, while the sum is 51.

The square root of 87085779 is about 9331.9761572777. The cubic root of 87085779 is about 443.2503430060.

The spelling of 87085779 in words is "eighty-seven million, eighty-five thousand, seven hundred seventy-nine".