977855 has 8 divisors (see below), whose sum is σ = 1180032. Its totient is φ = 777888.

The previous prime is 977849. The next prime is 977861. The reversal of 977855 is 558779.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (977849) and next prime (977861).

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 977855 - 2⁶ = 977791 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 7 ways as a sum of consecutive naturals, for example, 677 + ... + 1553.

It is an arithmetic number, because the mean of its divisors is an integer number (147504).

2⁹⁷⁷⁸⁵⁵ is an apocalyptic number.

977855 is a deficient number, since it is larger than the sum of its proper divisors (202177).

977855 is a wasteful number, since it uses less digits than its factorization.

977855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105.

The product of its digits is 88200, while the sum is 41.

The square root of 977855 is about 988.8655115839. The cubic root of 977855 is about 99.2563163904.

The spelling of 977855 in words is "nine hundred seventy-seven thousand, eight hundred fifty-five".