131172669 has 8 divisors (see below), whose sum is σ = 194329920. Its totient is φ = 87448428.

The previous prime is 131172649. The next prime is 131172673. The reversal of 131172669 is 966271131.

It is not a de Polignac number, because 131172669 - 2¹¹ = 131170621 is a prime.

It is a super-2 number, since 2×131172669² = 34412538185167122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131172649) 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, 2429097 + ... + 2429150.

It is an arithmetic number, because the mean of its divisors is an integer number (24291240).

Almost surely, 2^131172669 is an apocalyptic number.

It is an amenable number.

131172669 is a deficient number, since it is larger than the sum of its proper divisors (63157251).

131172669 is an equidigital number, since it uses as much as digits as its factorization.

131172669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4858256 (or 4858250 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 131172669 is about 11453.0637385810. The cubic root of 131172669 is about 508.0983506128.

It can be divided in two parts, 131172 and 669, that added together give a triangular number (131841 = T₅₁₃).

The spelling of 131172669 in words is "one hundred thirty-one million, one hundred seventy-two thousand, six hundred sixty-nine".