131664671 has 2 divisors, whose sum is σ = 131664672. Its totient is φ = 131664670.

The previous prime is 131664647. The next prime is 131664679. The reversal of 131664671 is 176466131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131664671 - 2⁶ = 131664607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131664679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65832335 + 65832336.

It is an arithmetic number, because the mean of its divisors is an integer number (65832336).

Almost surely, 2^131664671 is an apocalyptic number.

131664671 is a deficient number, since it is larger than the sum of its proper divisors (1).

131664671 is an equidigital number, since it uses as much as digits as its factorization.

131664671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 131664671 is about 11474.5226915981. The cubic root of 131664671 is about 508.7328158769.

The spelling of 131664671 in words is "one hundred thirty-one million, six hundred sixty-four thousand, six hundred seventy-one".