130731399 has 12 divisors (see below), whose sum is σ = 189398976. Its totient is φ = 86893632.

The previous prime is 130731389. The next prime is 130731401. The reversal of 130731399 is 993137031.

It is not a de Polignac number, because 130731399 - 2⁴ = 130731383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130731389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18519 + ... + 24584.

It is an arithmetic number, because the mean of its divisors is an integer number (15783248).

Almost surely, 2^130731399 is an apocalyptic number.

130731399 is a deficient number, since it is larger than the sum of its proper divisors (58667577).

130731399 is a wasteful number, since it uses less digits than its factorization.

130731399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43446 (or 43443 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 36.

The square root of 130731399 is about 11433.7832321590. The cubic root of 130731399 is about 507.5279562685.

The spelling of 130731399 in words is "one hundred thirty million, seven hundred thirty-one thousand, three hundred ninety-nine".