977867 has 4 divisors (see below), whose sum is σ = 1066776. Its totient is φ = 888960.

The previous prime is 977861. The next prime is 977881. The reversal of 977867 is 768779.

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 977867 - 2⁶ = 977803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977861) 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, 44438 + ... + 44459.

It is an arithmetic number, because the mean of its divisors is an integer number (266694).

2⁹⁷⁷⁸⁶⁷ is an apocalyptic number.

977867 is a deficient number, since it is larger than the sum of its proper divisors (88909).

977867 is a wasteful number, since it uses less digits than its factorization.

977867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88908.

The product of its digits is 148176, while the sum is 44.

The square root of 977867 is about 988.8715791244. The cubic root of 977867 is about 99.2567224052.

The spelling of 977867 in words is "nine hundred seventy-seven thousand, eight hundred sixty-seven".