131445473 has 2 divisors, whose sum is σ = 131445474. Its totient is φ = 131445472.

The previous prime is 131445463. The next prime is 131445563. The reversal of 131445473 is 374544131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123921424 + 7524049 = 11132^2 + 2743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131445473 is a prime.

It is not a weakly prime, because it can be changed into another prime (131445463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65722736 + 65722737.

It is an arithmetic number, because the mean of its divisors is an integer number (65722737).

Almost surely, 2^131445473 is an apocalyptic number.

It is an amenable number.

131445473 is a deficient number, since it is larger than the sum of its proper divisors (1).

131445473 is an equidigital number, since it uses as much as digits as its factorization.

131445473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 32.

The square root of 131445473 is about 11464.9672044886. The cubic root of 131445473 is about 508.4503428455.

The spelling of 131445473 in words is "one hundred thirty-one million, four hundred forty-five thousand, four hundred seventy-three".