977887 has 4 divisors (see below), whose sum is σ = 984600. Its totient is φ = 971176.

The previous prime is 977881. The next prime is 977897. The reversal of 977887 is 788779.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 977887 - 2¹⁹ = 453599 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 3133 + ... + 3430.

It is an arithmetic number, because the mean of its divisors is an integer number (246150).

2⁹⁷⁷⁸⁸⁷ is an apocalyptic number.

977887 is a deficient number, since it is larger than the sum of its proper divisors (6713).

977887 is a wasteful number, since it uses less digits than its factorization.

977887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6712.

The product of its digits is 197568, while the sum is 46.

The square root of 977887 is about 988.8816916093. The cubic root of 977887 is about 99.2573990893.

The spelling of 977887 in words is "nine hundred seventy-seven thousand, eight hundred eighty-seven".