977972 has 6 divisors (see below), whose sum is σ = 1711458. Its totient is φ = 488984.

The previous prime is 977971. The next prime is 978001. The reversal of 977972 is 279779.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 972196 + 5776 = 986^2 + 76^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122243 + ... + 122250.

It is an arithmetic number, because the mean of its divisors is an integer number (285243).

2⁹⁷⁷⁹⁷² is an apocalyptic number.

It is an amenable number.

977972 is a deficient number, since it is larger than the sum of its proper divisors (733486).

977972 is a wasteful number, since it uses less digits than its factorization.

977972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244497 (or 244495 counting only the distinct ones).

The product of its digits is 55566, while the sum is 41.

The square root of 977972 is about 988.9246685163. The cubic root of 977972 is about 99.2602748934.

The spelling of 977972 in words is "nine hundred seventy-seven thousand, nine hundred seventy-two".