697946131 has 4 divisors (see below), whose sum is σ = 697999032. Its totient is φ = 697893232.

The previous prime is 697946129. The next prime is 697946149. The reversal of 697946131 is 131649796.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 697946131 - 2¹ = 697946129 is a prime.

It is a super-2 number, since 2×697946131² = 974257603555738322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (697946111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11295 + ... + 39031.

It is an arithmetic number, because the mean of its divisors is an integer number (174499758).

Almost surely, 2^697946131 is an apocalyptic number.

697946131 is a deficient number, since it is larger than the sum of its proper divisors (52901).

697946131 is a wasteful number, since it uses less digits than its factorization.

697946131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52900.

The product of its digits is 244944, while the sum is 46.

The square root of 697946131 is about 26418.6701217151. The cubic root of 697946131 is about 887.0347517447.

The spelling of 697946131 in words is "six hundred ninety-seven million, nine hundred forty-six thousand, one hundred thirty-one".