131445997 has 2 divisors, whose sum is σ = 131445998. Its totient is φ = 131445996.

The previous prime is 131445973. The next prime is 131446019. The reversal of 131445997 is 799544131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67141636 + 64304361 = 8194^2 + 8019^2 .

It is a cyclic number.

It is not a de Polignac number, because 131445997 - 2¹⁵ = 131413229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131445907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65722998 + 65722999.

It is an arithmetic number, because the mean of its divisors is an integer number (65722999).

Almost surely, 2^131445997 is an apocalyptic number.

It is an amenable number.

131445997 is a deficient number, since it is larger than the sum of its proper divisors (1).

131445997 is an equidigital number, since it uses as much as digits as its factorization.

131445997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The square root of 131445997 is about 11464.9900566900. The cubic root of 131445997 is about 508.4510184808.

The spelling of 131445997 in words is "one hundred thirty-one million, four hundred forty-five thousand, nine hundred ninety-seven".