977977 has 16 divisors (see below), whose sum is σ = 1314432. Its totient is φ = 702720.

The previous prime is 977971. The next prime is 978001. The reversal of 977977 is 779779.

It is a cyclic number.

It is not a de Polignac number, because 977977 - 2⁷ = 977849 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (977971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513 + ... + 1489.

It is an arithmetic number, because the mean of its divisors is an integer number (82152).

2⁹⁷⁷⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

977977 is a deficient number, since it is larger than the sum of its proper divisors (336455).

977977 is a wasteful number, since it uses less digits than its factorization.

977977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008.

The product of its digits is 194481, while the sum is 46.

The square root of 977977 is about 988.9271965115. The cubic root of 977977 is about 99.2604440532.

The spelling of 977977 in words is "nine hundred seventy-seven thousand, nine hundred seventy-seven".