131333479 has 4 divisors (see below), whose sum is σ = 131897376. Its totient is φ = 130769584.

The previous prime is 131333443. The next prime is 131333507. The reversal of 131333479 is 974333131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131333479 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 (131333879) 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, 281599 + ... + 282064.

It is an arithmetic number, because the mean of its divisors is an integer number (32974344).

Almost surely, 2^131333479 is an apocalyptic number.

131333479 is a deficient number, since it is larger than the sum of its proper divisors (563897).

131333479 is an equidigital number, since it uses as much as digits as its factorization.

131333479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563896.

The product of its digits is 20412, while the sum is 34.

The square root of 131333479 is about 11460.0819805096. The cubic root of 131333479 is about 508.3058987493.

The spelling of 131333479 in words is "one hundred thirty-one million, three hundred thirty-three thousand, four hundred seventy-nine".