977921167 has 4 divisors (see below), whose sum is σ = 978001120. Its totient is φ = 977841216.

The previous prime is 977921143. The next prime is 977921173. The reversal of 977921167 is 761129779.

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 a de Polignac number, because none of the positive numbers 2^k-977921167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 977921167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977921467) 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, 17367 + ... + 47512.

It is an arithmetic number, because the mean of its divisors is an integer number (244500280).

Almost surely, 2^977921167 is an apocalyptic number.

977921167 is a deficient number, since it is larger than the sum of its proper divisors (79953).

977921167 is a wasteful number, since it uses less digits than its factorization.

977921167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79952.

The product of its digits is 333396, while the sum is 49.

The square root of 977921167 is about 31271.7311161375. The cubic root of 977921167 is about 992.5855508107.

The spelling of 977921167 in words is "nine hundred seventy-seven million, nine hundred twenty-one thousand, one hundred sixty-seven".