80977885 has 8 divisors (see below), whose sum is σ = 102889656. Its totient is φ = 60971520.

The previous prime is 80977837. The next prime is 80977907. The reversal of 80977885 is 58877908.

It can be written as a sum of positive squares in 4 ways, for example, as 1179396 + 79798489 = 1086^2 + 8933^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-80977885 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476256 + ... + 476425.

It is an arithmetic number, because the mean of its divisors is an integer number (12861207).

Almost surely, 2^80977885 is an apocalyptic number.

80977885 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80977885 is a deficient number, since it is larger than the sum of its proper divisors (21911771).

80977885 is a wasteful number, since it uses less digits than its factorization.

80977885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952703.

The product of its (nonzero) digits is 1128960, while the sum is 52.

The square root of 80977885 is about 8998.7713050171. The cubic root of 80977885 is about 432.6354905337.

The spelling of 80977885 in words is "eighty million, nine hundred seventy-seven thousand, eight hundred eighty-five".