131850997 has 8 divisors (see below), whose sum is σ = 139743576. Its totient is φ = 123973632.

The previous prime is 131850991. The next prime is 131851001. The reversal of 131850997 is 799058131.

It can be written as a sum of positive squares in 4 ways, for example, as 46362481 + 85488516 = 6809^2 + 9246^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131850997 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 (131850991) 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, 17503 + ... + 23875.

It is an arithmetic number, because the mean of its divisors is an integer number (17467947).

Almost surely, 2^131850997 is an apocalyptic number.

131850997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

131850997 is a deficient number, since it is larger than the sum of its proper divisors (7892579).

131850997 is a wasteful number, since it uses less digits than its factorization.

131850997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7607.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 131850997 is about 11482.6389388503. The cubic root of 131850997 is about 508.9726814657.

The spelling of 131850997 in words is "one hundred thirty-one million, eight hundred fifty thousand, nine hundred ninety-seven".