87847771079 has 4 divisors (see below), whose sum is σ = 87848511240. Its totient is φ = 87847030920.

The previous prime is 87847771073. The next prime is 87847771127. The reversal of 87847771079 is 97017774878.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 87847771079 - 2⁸ = 87847770823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87847771073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147377 + ... + 444314.

It is an arithmetic number, because the mean of its divisors is an integer number (21962127810).

Almost surely, 2^87847771079 is an apocalyptic number.

87847771079 is a deficient number, since it is larger than the sum of its proper divisors (740161).

87847771079 is a wasteful number, since it uses less digits than its factorization.

87847771079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740160.

The product of its (nonzero) digits is 38723328, while the sum is 65.

The spelling of 87847771079 in words is "eighty-seven billion, eight hundred forty-seven million, seven hundred seventy-one thousand, seventy-nine".