131992807 has 4 divisors (see below), whose sum is σ = 132044896. Its totient is φ = 131940720.

The previous prime is 131992799. The next prime is 131992831. The reversal of 131992807 is 708299131.

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 131992807 - 2³ = 131992799 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 131992807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131992877) 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, 22038 + ... + 27379.

It is an arithmetic number, because the mean of its divisors is an integer number (33011224).

Almost surely, 2^131992807 is an apocalyptic number.

131992807 is a deficient number, since it is larger than the sum of its proper divisors (52089).

131992807 is an equidigital number, since it uses as much as digits as its factorization.

131992807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52088.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 131992807 is about 11488.8122536666. The cubic root of 131992807 is about 509.1550882649.

The spelling of 131992807 in words is "one hundred thirty-one million, nine hundred ninety-two thousand, eight hundred seven".