977885 has 8 divisors (see below), whose sum is σ = 1179576. Its totient is φ = 778240.

The previous prime is 977881. The next prime is 977897. The reversal of 977885 is 588779.

It can be written as a sum of positive squares in 4 ways, for example, as 77284 + 900601 = 278^2 + 949^2 .

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

It is not a de Polignac number, because 977885 - 2² = 977881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 977885.

It is not an unprimeable number, because it can be changed into a prime (977881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905 + ... + 1665.

It is an arithmetic number, because the mean of its divisors is an integer number (147447).

2⁹⁷⁷⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

977885 is a deficient number, since it is larger than the sum of its proper divisors (201691).

977885 is a wasteful number, since it uses less digits than its factorization.

977885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023.

The product of its digits is 141120, while the sum is 44.

The square root of 977885 is about 988.8806803654. The cubic root of 977885 is about 99.2573314213.

The spelling of 977885 in words is "nine hundred seventy-seven thousand, eight hundred eighty-five".