131387573 has 2 divisors, whose sum is σ = 131387574. Its totient is φ = 131387572.

The previous prime is 131387539. The next prime is 131387587. The reversal of 131387573 is 375783131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122036209 + 9351364 = 11047^2 + 3058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131387573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131387533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65693786 + 65693787.

It is an arithmetic number, because the mean of its divisors is an integer number (65693787).

Almost surely, 2^131387573 is an apocalyptic number.

It is an amenable number.

131387573 is a deficient number, since it is larger than the sum of its proper divisors (1).

131387573 is an equidigital number, since it uses as much as digits as its factorization.

131387573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 131387573 is about 11462.4418428187. The cubic root of 131387573 is about 508.3756766543.

The spelling of 131387573 in words is "one hundred thirty-one million, three hundred eighty-seven thousand, five hundred seventy-three".