131669949 has 8 divisors (see below), whose sum is σ = 175612960. Its totient is φ = 87753456.

The previous prime is 131669921. The next prime is 131669953. The reversal of 131669949 is 949966131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131669949 - 2²⁰ = 130621373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131669898 and 131669907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131669969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15867 + ... + 22695.

It is an arithmetic number, because the mean of its divisors is an integer number (21951620).

Almost surely, 2^131669949 is an apocalyptic number.

It is an amenable number.

131669949 is a deficient number, since it is larger than the sum of its proper divisors (43943011).

131669949 is an equidigital number, since it uses as much as digits as its factorization.

131669949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13259.

The product of its digits is 314928, while the sum is 48.

The square root of 131669949 is about 11474.7526770733. The cubic root of 131669949 is about 508.7396135898.

The spelling of 131669949 in words is "one hundred thirty-one million, six hundred sixty-nine thousand, nine hundred forty-nine".