977977887 has 8 divisors (see below), whose sum is σ = 1380674736. Its totient is φ = 613633152.

The previous prime is 977977883. The next prime is 977977901. The reversal of 977977887 is 788779779.

977977887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 977977887 - 2² = 977977883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977977883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9587968 + ... + 9588069.

It is an arithmetic number, because the mean of its divisors is an integer number (172584342).

Almost surely, 2^977977887 is an apocalyptic number.

977977887 is a deficient number, since it is larger than the sum of its proper divisors (402696849).

977977887 is a wasteful number, since it uses less digits than its factorization.

977977887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19176057.

The product of its digits is 87127488, while the sum is 69.

The square root of 977977887 is about 31272.6379923408. The cubic root of 977977887 is about 992.6047406206.

The spelling of 977977887 in words is "nine hundred seventy-seven million, nine hundred seventy-seven thousand, eight hundred eighty-seven".