977945 has 8 divisors (see below), whose sum is σ = 1179144. Its totient is φ = 778624.

The previous prime is 977927. The next prime is 977971. The reversal of 977945 is 549779.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 64009 + 913936 = 253^2 + 956^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 977945 - 2⁶ = 977881 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1277 + ... + 1893.

It is an arithmetic number, because the mean of its divisors is an integer number (147393).

2⁹⁷⁷⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

977945 is a deficient number, since it is larger than the sum of its proper divisors (201199).

977945 is a wasteful number, since it uses less digits than its factorization.

977945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939.

The product of its digits is 79380, while the sum is 41.

The square root of 977945 is about 988.9110172306. The cubic root of 977945 is about 99.2593614207.

The spelling of 977945 in words is "nine hundred seventy-seven thousand, nine hundred forty-five".