131304493 has 4 divisors (see below), whose sum is σ = 137013408. Its totient is φ = 125595580.

The previous prime is 131304473. The next prime is 131304517. The reversal of 131304493 is 394403131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 394403131 = 683 ⋅577457.

It is a cyclic number.

It is not a de Polignac number, because 131304493 - 2²¹ = 129207341 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 (131304403) 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, 2854423 + ... + 2854468.

It is an arithmetic number, because the mean of its divisors is an integer number (34253352).

Almost surely, 2^131304493 is an apocalyptic number.

It is an amenable number.

131304493 is a deficient number, since it is larger than the sum of its proper divisors (5708915).

131304493 is an equidigital number, since it uses as much as digits as its factorization.

131304493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5708914.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 131304493 is about 11458.8172600840. The cubic root of 131304493 is about 508.2685007226.

The spelling of 131304493 in words is "one hundred thirty-one million, three hundred four thousand, four hundred ninety-three".