131991167 has 8 divisors (see below), whose sum is σ = 164560512. Its totient is φ = 102850200.

The previous prime is 131991137. The next prime is 131991169. The reversal of 131991167 is 761199131.

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 131991167 - 2⁶ = 131991103 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 131991167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131991169) 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, 857009 + ... + 857162.

It is an arithmetic number, because the mean of its divisors is an integer number (20570064).

Almost surely, 2^131991167 is an apocalyptic number.

131991167 is a deficient number, since it is larger than the sum of its proper divisors (32569345).

131991167 is a wasteful number, since it uses less digits than its factorization.

131991167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714189.

The product of its digits is 10206, while the sum is 38.

The square root of 131991167 is about 11488.7408796613. The cubic root of 131991167 is about 509.1529795192.

The spelling of 131991167 in words is "one hundred thirty-one million, nine hundred ninety-one thousand, one hundred sixty-seven".