131030399 has 4 divisors (see below), whose sum is σ = 131053560. Its totient is φ = 131007240.

The previous prime is 131030387. The next prime is 131030411. The reversal of 131030399 is 993030131.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (131030387) and next prime (131030411).

It is a cyclic number.

It is not a de Polignac number, because 131030399 - 2⁸ = 131030143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131030309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3164 + ... + 16494.

It is an arithmetic number, because the mean of its divisors is an integer number (32763390).

Almost surely, 2^131030399 is an apocalyptic number.

131030399 is a deficient number, since it is larger than the sum of its proper divisors (23161).

131030399 is an equidigital number, since it uses as much as digits as its factorization.

131030399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23160.

The product of its (nonzero) digits is 2187, while the sum is 29.

The square root of 131030399 is about 11446.8510517085. The cubic root of 131030399 is about 507.9145895115.

The spelling of 131030399 in words is "one hundred thirty-one million, thirty thousand, three hundred ninety-nine".