80977887 has 10 divisors (see below), whose sum is σ = 120967088. Its totient is φ = 53985204.

The previous prime is 80977837. The next prime is 80977907. The reversal of 80977887 is 78877908.

It is not a de Polignac number, because 80977887 - 2⁷ = 80977759 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 (80977837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 499783 + ... + 499944.

Almost surely, 2^80977887 is an apocalyptic number.

80977887 is a deficient number, since it is larger than the sum of its proper divisors (39989201).

80977887 is an equidigital number, since it uses as much as digits as its factorization.

80977887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999739 (or 999730 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 54.

The square root of 80977887 is about 8998.7714161434. The cubic root of 80977887 is about 432.6354940954.

The spelling of 80977887 in words is "eighty million, nine hundred seventy-seven thousand, eight hundred eighty-seven".