977764 has 12 divisors (see below), whose sum is σ = 1770300. Its totient is φ = 471968.

The previous prime is 977761. The next prime is 977791. The reversal of 977764 is 467779.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 324900 + 652864 = 570^2 + 808^2 .

It is a nialpdrome in base 10 and base 16.

It is not an unprimeable number, because it can be changed into a prime (977761) 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, 4099 + ... + 4330.

It is an arithmetic number, because the mean of its divisors is an integer number (147525).

2⁹⁷⁷⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

977764 is a deficient number, since it is larger than the sum of its proper divisors (792536).

977764 is a wasteful number, since it uses less digits than its factorization.

977764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8462 (or 8460 counting only the distinct ones).

The product of its digits is 74088, while the sum is 40.

The square root of 977764 is about 988.8194981896. The cubic root of 977764 is about 99.2532373364.

The spelling of 977764 in words is "nine hundred seventy-seven thousand, seven hundred sixty-four".