131158669 has 4 divisors (see below), whose sum is σ = 131632444. Its totient is φ = 130684896.

The previous prime is 131158667. The next prime is 131158697. The reversal of 131158669 is 966851131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20593444 + 110565225 = 4538^2 + 10515^2 .

It is a cyclic number.

It is not a de Polignac number, because 131158669 - 2¹ = 131158667 is a prime.

It is a super-2 number, since 2×131158669² = 34405192907703122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131158661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236472 + ... + 237025.

It is an arithmetic number, because the mean of its divisors is an integer number (32908111).

Almost surely, 2^131158669 is an apocalyptic number.

It is an amenable number.

131158669 is a deficient number, since it is larger than the sum of its proper divisors (473775).

131158669 is an equidigital number, since it uses as much as digits as its factorization.

131158669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473774.

The product of its digits is 38880, while the sum is 40.

The square root of 131158669 is about 11452.4525320998. The cubic root of 131158669 is about 508.0802736002.

The spelling of 131158669 in words is "one hundred thirty-one million, one hundred fifty-eight thousand, six hundred sixty-nine".