977391 has 12 divisors (see below), whose sum is σ = 1424280. Its totient is φ = 645840.

The previous prime is 977369. The next prime is 977407. The reversal of 977391 is 193779.

It is not a de Polignac number, because 977391 - 2⁵ = 977359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977351) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 765 + ... + 1593.

It is an arithmetic number, because the mean of its divisors is an integer number (118690).

2⁹⁷⁷³⁹¹ is an apocalyptic number.

977391 is a deficient number, since it is larger than the sum of its proper divisors (446889).

977391 is a wasteful number, since it uses less digits than its factorization.

977391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966 (or 963 counting only the distinct ones).

The product of its digits is 11907, while the sum is 36.

The square root of 977391 is about 988.6308714581. The cubic root of 977391 is about 99.2406146019.

The spelling of 977391 in words is "nine hundred seventy-seven thousand, three hundred ninety-one".