689496131 has 2 divisors, whose sum is σ = 689496132. Its totient is φ = 689496130.

The previous prime is 689496127. The next prime is 689496179. The reversal of 689496131 is 131694986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689496131 - 2² = 689496127 is a prime.

It is a super-2 number, since 2×689496131² = 950809829327938322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (689493131) 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 as a sum of consecutive naturals, namely, 344748065 + 344748066.

It is an arithmetic number, because the mean of its divisors is an integer number (344748066).

Almost surely, 2^689496131 is an apocalyptic number.

689496131 is a deficient number, since it is larger than the sum of its proper divisors (1).

689496131 is an equidigital number, since it uses as much as digits as its factorization.

689496131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 47.

The square root of 689496131 is about 26258.2583390445. The cubic root of 689496131 is about 883.4404448571.

The spelling of 689496131 in words is "six hundred eighty-nine million, four hundred ninety-six thousand, one hundred thirty-one".