977965 has 4 divisors (see below), whose sum is σ = 1173564. Its totient is φ = 782368.

The previous prime is 977927. The next prime is 977971. The reversal of 977965 is 569779.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 649636 + 328329 = 806^2 + 573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-977965 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97792 + ... + 97801.

It is an arithmetic number, because the mean of its divisors is an integer number (293391).

2⁹⁷⁷⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

977965 is a deficient number, since it is larger than the sum of its proper divisors (195599).

977965 is a wasteful number, since it uses less digits than its factorization.

977965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195598.

The product of its digits is 119070, while the sum is 43.

The square root of 977965 is about 988.9211293121. The cubic root of 977965 is about 99.2600380688.

The spelling of 977965 in words is "nine hundred seventy-seven thousand, nine hundred sixty-five".