131537569 has 2 divisors, whose sum is σ = 131537570. Its totient is φ = 131537568.

The previous prime is 131537563. The next prime is 131537599. The reversal of 131537569 is 965735131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93837969 + 37699600 = 9687^2 + 6140^2 .

It is a cyclic number.

It is not a de Polignac number, because 131537569 - 2²¹ = 129440417 is a prime.

It is a super-2 number, since 2×131537569² = 34604264116859522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131537563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65768784 + 65768785.

It is an arithmetic number, because the mean of its divisors is an integer number (65768785).

Almost surely, 2^131537569 is an apocalyptic number.

It is an amenable number.

131537569 is a deficient number, since it is larger than the sum of its proper divisors (1).

131537569 is an equidigital number, since it uses as much as digits as its factorization.

131537569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 40.

The square root of 131537569 is about 11468.9829104415. The cubic root of 131537569 is about 508.5690620625.

The spelling of 131537569 in words is "one hundred thirty-one million, five hundred thirty-seven thousand, five hundred sixty-nine".