697077131 has 2 divisors, whose sum is σ = 697077132. Its totient is φ = 697077130.

The previous prime is 697077109. The next prime is 697077133. The reversal of 697077131 is 131770796.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-697077131 is a prime.

It is a super-2 number, since 2×697077131² = 971833053126382322, which contains 22 as substring.

Together with 697077133, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (697077133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348538565 + 348538566.

It is an arithmetic number, because the mean of its divisors is an integer number (348538566).

Almost surely, 2^697077131 is an apocalyptic number.

697077131 is a deficient number, since it is larger than the sum of its proper divisors (1).

697077131 is an equidigital number, since it uses as much as digits as its factorization.

697077131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55566, while the sum is 41.

The square root of 697077131 is about 26402.2182969538. The cubic root of 697077131 is about 886.6664552515. Note that the first 3 decimals are identical.

The spelling of 697077131 in words is "six hundred ninety-seven million, seventy-seven thousand, one hundred thirty-one".