131479091 has 4 divisors (see below), whose sum is σ = 135720384. Its totient is φ = 127237800.

The previous prime is 131479021. The next prime is 131479097. The reversal of 131479091 is 190974131.

It is a happy number.

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-131479091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131479097) 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, 2120600 + ... + 2120661.

It is an arithmetic number, because the mean of its divisors is an integer number (33930096).

Almost surely, 2^131479091 is an apocalyptic number.

131479091 is a deficient number, since it is larger than the sum of its proper divisors (4241293).

131479091 is an equidigital number, since it uses as much as digits as its factorization.

131479091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4241292.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 131479091 is about 11466.4332292130. The cubic root of 131479091 is about 508.4936856000.

The spelling of 131479091 in words is "one hundred thirty-one million, four hundred seventy-nine thousand, ninety-one".