79889887 has 12 divisors (see below), whose sum is σ = 100358608. Its totient is φ = 62251200.

The previous prime is 79889881. The next prime is 79889891. The reversal of 79889887 is 78898897.

It is not a de Polignac number, because 79889887 - 2¹⁹ = 79365599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79889881) 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, 46314 + ... + 48007.

Almost surely, 2^79889887 is an apocalyptic number.

79889887 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

79889887 is a deficient number, since it is larger than the sum of its proper divisors (20468721).

79889887 is a wasteful number, since it uses less digits than its factorization.

79889887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94350 (or 94339 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 64.

The square root of 79889887 is about 8938.1142865819. The cubic root of 79889887 is about 430.6891545122.

The spelling of 79889887 in words is "seventy-nine million, eight hundred eighty-nine thousand, eight hundred eighty-seven".