131856701 has 2 divisors, whose sum is σ = 131856702. Its totient is φ = 131856700.

The previous prime is 131856689. The next prime is 131856749. The reversal of 131856701 is 107658131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66667225 + 65189476 = 8165^2 + 8074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131856701 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131856601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65928350 + 65928351.

It is an arithmetic number, because the mean of its divisors is an integer number (65928351).

Almost surely, 2^131856701 is an apocalyptic number.

It is an amenable number.

131856701 is a deficient number, since it is larger than the sum of its proper divisors (1).

131856701 is an equidigital number, since it uses as much as digits as its factorization.

131856701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 131856701 is about 11482.8873111252. The cubic root of 131856701 is about 508.9800209079.

The spelling of 131856701 in words is "one hundred thirty-one million, eight hundred fifty-six thousand, seven hundred one".