131479668 has 36 divisors (see below), whose sum is σ = 333611460. Its totient is φ = 43660416.

The previous prime is 131479657. The next prime is 131479669. The reversal of 131479668 is 866974131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70358544 + 61121124 = 8388^2 + 7818^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131479669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2896 + ... + 16472.

It is an arithmetic number, because the mean of its divisors is an integer number (9266985).

Almost surely, 2^131479668 is an apocalyptic number.

131479668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

131479668 is an abundant number, since it is smaller than the sum of its proper divisors (202131792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131479668 is a wasteful number, since it uses less digits than its factorization.

131479668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13856 (or 13851 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 131479668 is about 11466.4583895813. The cubic root of 131479668 is about 508.4944294456.

The spelling of 131479668 in words is "one hundred thirty-one million, four hundred seventy-nine thousand, six hundred sixty-eight".