131679689 has 2 divisors, whose sum is σ = 131679690. Its totient is φ = 131679688.

The previous prime is 131679677. The next prime is 131679697. The reversal of 131679689 is 986976131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116532025 + 15147664 = 10795^2 + 3892^2 .

It is a cyclic number.

It is not a de Polignac number, because 131679689 - 2⁴ = 131679673 is a prime.

It is not a weakly prime, because it can be changed into another prime (131679619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65839844 + 65839845.

It is an arithmetic number, because the mean of its divisors is an integer number (65839845).

Almost surely, 2^131679689 is an apocalyptic number.

It is an amenable number.

131679689 is a deficient number, since it is larger than the sum of its proper divisors (1).

131679689 is an equidigital number, since it uses as much as digits as its factorization.

131679689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 50.

The square root of 131679689 is about 11475.1770792437. The cubic root of 131679689 is about 508.7521575851.

The spelling of 131679689 in words is "one hundred thirty-one million, six hundred seventy-nine thousand, six hundred eighty-nine".