131664139 has 4 divisors (see below), whose sum is σ = 131702760. Its totient is φ = 131625520.

The previous prime is 131664119. The next prime is 131664149. The reversal of 131664139 is 931466131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 131664139 - 2⁵ = 131664107 is a prime.

It is a super-2 number, since 2×131664139² = 34670890997222642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131664119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13642 + ... + 21199.

It is an arithmetic number, because the mean of its divisors is an integer number (32925690).

Almost surely, 2^131664139 is an apocalyptic number.

131664139 is a deficient number, since it is larger than the sum of its proper divisors (38621).

131664139 is an equidigital number, since it uses as much as digits as its factorization.

131664139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38620.

The product of its digits is 11664, while the sum is 34.

The square root of 131664139 is about 11474.4995097826. The cubic root of 131664139 is about 508.7321306862.

The spelling of 131664139 in words is "one hundred thirty-one million, six hundred sixty-four thousand, one hundred thirty-nine".