131433669 has 18 divisors (see below), whose sum is σ = 191375730. Its totient is φ = 86922048.

The previous prime is 131433641. The next prime is 131433683. The reversal of 131433669 is 966334131.

131433669 is a `hidden beast` number, since 1 + 314 + 336 + 6 + 9 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 4601025 + 126832644 = 2145^2 + 11262^2 .

It is not a de Polignac number, because 131433669 - 2⁷ = 131433541 is a prime.

It is a super-2 number, since 2×131433669² = 34549618693603122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131433629) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 488467 + ... + 488735.

It is an arithmetic number, because the mean of its divisors is an integer number (10631985).

Almost surely, 2^131433669 is an apocalyptic number.

It is an amenable number.

131433669 is a deficient number, since it is larger than the sum of its proper divisors (59942061).

131433669 is an equidigital number, since it uses as much as digits as its factorization.

131433669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741 (or 505 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 131433669 is about 11464.4524073329. The cubic root of 131433669 is about 508.4351225229.

The spelling of 131433669 in words is "one hundred thirty-one million, four hundred thirty-three thousand, six hundred sixty-nine".