131090605 has 8 divisors (see below), whose sum is σ = 157374072. Its totient is φ = 104828928.

The previous prime is 131090573. The next prime is 131090623. The reversal of 131090605 is 506090131.

It can be written as a sum of positive squares in 4 ways, for example, as 2812329 + 128278276 = 1677^2 + 11326^2 .

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 131090605 - 2⁵ = 131090573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131090605.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14317 + ... + 21613.

It is an arithmetic number, because the mean of its divisors is an integer number (19671759).

Almost surely, 2^131090605 is an apocalyptic number.

It is an amenable number.

131090605 is a deficient number, since it is larger than the sum of its proper divisors (26283467).

131090605 is an equidigital number, since it uses as much as digits as its factorization.

131090605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10895.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 131090605 is about 11449.4805559030. The cubic root of 131090605 is about 507.9923699951.

The spelling of 131090605 in words is "one hundred thirty-one million, ninety thousand, six hundred five".