131240569 has 2 divisors, whose sum is σ = 131240570. Its totient is φ = 131240568.

The previous prime is 131240563. The next prime is 131240609. The reversal of 131240569 is 965042131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130804969 + 435600 = 11437^2 + 660^2 .

It is a cyclic number.

It is not a de Polignac number, because 131240569 - 2⁵ = 131240537 is a prime.

It is a super-2 number, since 2×131240569² = 34448173902887522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131240569.

It is not a weakly prime, because it can be changed into another prime (131240563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65620284 + 65620285.

It is an arithmetic number, because the mean of its divisors is an integer number (65620285).

Almost surely, 2^131240569 is an apocalyptic number.

It is an amenable number.

131240569 is a deficient number, since it is larger than the sum of its proper divisors (1).

131240569 is an equidigital number, since it uses as much as digits as its factorization.

131240569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 131240569 is about 11456.0276274108. The cubic root of 131240569 is about 508.1860058822.

The spelling of 131240569 in words is "one hundred thirty-one million, two hundred forty thousand, five hundred sixty-nine".