131330997 has 16 divisors (see below), whose sum is σ = 222359680. Its totient is φ = 75046176.

The previous prime is 131330993. The next prime is 131331017. The reversal of 131330997 is 799033131.

It is not a de Polignac number, because 131330997 - 2² = 131330993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131330993) 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 15 ways as a sum of consecutive naturals, for example, 347248 + ... + 347625.

It is an arithmetic number, because the mean of its divisors is an integer number (13897480).

Almost surely, 2^131330997 is an apocalyptic number.

It is an amenable number.

131330997 is a deficient number, since it is larger than the sum of its proper divisors (91028683).

131330997 is an equidigital number, since it uses as much as digits as its factorization.

131330997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694889 (or 694883 counting only the distinct ones).

The product of its (nonzero) digits is 15309, while the sum is 36.

The square root of 131330997 is about 11459.9736910693. The cubic root of 131330997 is about 508.3026966636.

The spelling of 131330997 in words is "one hundred thirty-one million, three hundred thirty thousand, nine hundred ninety-seven".