131910393 has 4 divisors (see below), whose sum is σ = 175880528. Its totient is φ = 87940260.

The previous prime is 131910391. The next prime is 131910409. The reversal of 131910393 is 393019131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 131910393 - 2¹ = 131910391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131910393.

It is not an unprimeable number, because it can be changed into a prime (131910391) 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, 21985063 + ... + 21985068.

It is an arithmetic number, because the mean of its divisors is an integer number (43970132).

Almost surely, 2^131910393 is an apocalyptic number.

It is an amenable number.

131910393 is a deficient number, since it is larger than the sum of its proper divisors (43970135).

131910393 is an equidigital number, since it uses as much as digits as its factorization.

131910393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43970134.

The product of its (nonzero) digits is 2187, while the sum is 30.

The square root of 131910393 is about 11485.2249869125. The cubic root of 131910393 is about 509.0490970250.

The spelling of 131910393 in words is "one hundred thirty-one million, nine hundred ten thousand, three hundred ninety-three".