131579761 has 8 divisors (see below), whose sum is σ = 134403624. Its totient is φ = 128768640.

The previous prime is 131579741. The next prime is 131579771. The reversal of 131579761 is 167975131.

It can be written as a sum of positive squares in 4 ways, for example, as 19749136 + 111830625 = 4444^2 + 10575^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131579761 - 2¹¹ = 131577713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131579741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19365 + ... + 25261.

It is an arithmetic number, because the mean of its divisors is an integer number (16800453).

Almost surely, 2^131579761 is an apocalyptic number.

It is an amenable number.

131579761 is a deficient number, since it is larger than the sum of its proper divisors (2823863).

131579761 is an equidigital number, since it uses as much as digits as its factorization.

131579761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6371.

The product of its digits is 39690, while the sum is 40.

The square root of 131579761 is about 11470.8221588516. The cubic root of 131579761 is about 508.6234324658.

The spelling of 131579761 in words is "one hundred thirty-one million, five hundred seventy-nine thousand, seven hundred sixty-one".