977971321 has 16 divisors (see below), whose sum is σ = 1027676160. Its totient is φ = 929420800.

The previous prime is 977971297. The next prime is 977971361. The reversal of 977971321 is 123179779.

977971321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 977971321 - 2¹⁵ = 977938553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977971361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849096 + ... + 850246.

It is an arithmetic number, because the mean of its divisors is an integer number (64229760).

Almost surely, 2^977971321 is an apocalyptic number.

It is an amenable number.

977971321 is a deficient number, since it is larger than the sum of its proper divisors (49704839).

977971321 is a wasteful number, since it uses less digits than its factorization.

977971321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1616.

The product of its digits is 166698, while the sum is 46.

The square root of 977971321 is about 31272.5330122138. The cubic root of 977971321 is about 992.6025192148.

The spelling of 977971321 in words is "nine hundred seventy-seven million, nine hundred seventy-one thousand, three hundred twenty-one".