131725579 has 4 divisors (see below), whose sum is σ = 134938440. Its totient is φ = 128512720.

The previous prime is 131725523. The next prime is 131725591. The reversal of 131725579 is 975527131.

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 131725579 - 2¹³ = 131717387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131725379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1606369 + ... + 1606450.

It is an arithmetic number, because the mean of its divisors is an integer number (33734610).

Almost surely, 2^131725579 is an apocalyptic number.

131725579 is a deficient number, since it is larger than the sum of its proper divisors (3212861).

131725579 is an equidigital number, since it uses as much as digits as its factorization.

131725579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212860.

The product of its digits is 66150, while the sum is 40.

The square root of 131725579 is about 11477.1764384800. The cubic root of 131725579 is about 508.8112502848.

It can be divided in two parts, 1317 and 25579, that added together give a square (26896 = 164²).

The spelling of 131725579 in words is "one hundred thirty-one million, seven hundred twenty-five thousand, five hundred seventy-nine".