131304689 has 4 divisors (see below), whose sum is σ = 131347440. Its totient is φ = 131261940.

The previous prime is 131304653. The next prime is 131304697. The reversal of 131304689 is 986403131.

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: 986403131 = 7 ⋅140914733.

It is a cyclic number.

It is not a de Polignac number, because 131304689 - 2¹⁶ = 131239153 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131304289) 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, 16379 + ... + 23040.

It is an arithmetic number, because the mean of its divisors is an integer number (32836860).

Almost surely, 2^131304689 is an apocalyptic number.

It is an amenable number.

131304689 is a deficient number, since it is larger than the sum of its proper divisors (42751).

131304689 is an equidigital number, since it uses as much as digits as its factorization.

131304689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42750.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 131304689 is about 11458.8258124469. The cubic root of 131304689 is about 508.2687536223.

The spelling of 131304689 in words is "one hundred thirty-one million, three hundred four thousand, six hundred eighty-nine".