87698779 has 12 divisors (see below), whose sum is σ = 103543464. Its totient is φ = 74045664.

The previous prime is 87698777. The next prime is 87698789. The reversal of 87698779 is 97789678.

It is not a de Polignac number, because 87698779 - 2¹ = 87698777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87698771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10074 + ... + 16639.

It is an arithmetic number, because the mean of its divisors is an integer number (8628622).

Almost surely, 2^87698779 is an apocalyptic number.

87698779 is a deficient number, since it is larger than the sum of its proper divisors (15844685).

87698779 is a wasteful number, since it uses less digits than its factorization.

87698779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26794 (or 26787 counting only the distinct ones).

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

The square root of 87698779 is about 9364.7626237935. The cubic root of 87698779 is about 444.2879307481.

The spelling of 87698779 in words is "eighty-seven million, six hundred ninety-eight thousand, seven hundred seventy-nine".