977889 has 8 divisors (see below), whose sum is σ = 1422432. Its totient is φ = 592640.

The previous prime is 977881. The next prime is 977897. The reversal of 977889 is 988779.

It is an interprime number because it is at equal distance from previous prime (977881) and next prime (977897).

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 977889 - 2³ = 977881 is a prime.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14784 + ... + 14849.

It is an arithmetic number, because the mean of its divisors is an integer number (177804).

2⁹⁷⁷⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

977889 is a deficient number, since it is larger than the sum of its proper divisors (444543).

977889 is a wasteful number, since it uses less digits than its factorization.

977889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29647.

The product of its digits is 254016, while the sum is 48.

The square root of 977889 is about 988.8827028521. The cubic root of 977889 is about 99.2574667572.

The spelling of 977889 in words is "nine hundred seventy-seven thousand, eight hundred eighty-nine".