131191669 has 32 divisors (see below), whose sum is σ = 164160000. Its totient is φ = 104428800.

The previous prime is 131191631. The next prime is 131191681. The reversal of 131191669 is 966191131.

It is not a de Polignac number, because 131191669 - 2¹⁷ = 131060597 is a prime.

It is a super-2 number, since 2×131191669² = 34422508030011122, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (8748) is a multiple of the sum of its prime divisors (324).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131191369) 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 31 ways as a sum of consecutive naturals, for example, 868744 + ... + 868894.

It is an arithmetic number, because the mean of its divisors is an integer number (5130000).

Almost surely, 2^131191669 is an apocalyptic number.

It is an amenable number.

131191669 is a deficient number, since it is larger than the sum of its proper divisors (32968331).

131191669 is a wasteful number, since it uses less digits than its factorization.

131191669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 324 counting only the distinct ones).

The product of its digits is 8748, while the sum is 37.

The square root of 131191669 is about 11453.8931809232. The cubic root of 131191669 is about 508.1228816442.

The spelling of 131191669 in words is "one hundred thirty-one million, one hundred ninety-one thousand, six hundred sixty-nine".