697977 has 20 divisors (see below), whose sum is σ = 1192576. Its totient is φ = 398520.

The previous prime is 697973. The next prime is 697979. The reversal of 697977 is 779796.

It is not a de Polignac number, because 697977 - 2² = 697973 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697977.

It is not an unprimeable number, because it can be changed into a prime (697973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49 + ... + 1182.

2⁶⁹⁷⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

697977 is a deficient number, since it is larger than the sum of its proper divisors (494599).

697977 is a wasteful number, since it uses less digits than its factorization.

697977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250 (or 1241 counting only the distinct ones).

The product of its digits is 166698, while the sum is 45.

The square root of 697977 is about 835.4501780477. The cubic root of 697977 is about 88.7047828911.

It can be divided in two parts, 6979 and 77, that added together give a square (7056 = 84²).

The spelling of 697977 in words is "six hundred ninety-seven thousand, nine hundred seventy-seven".