131668739 has 2 divisors, whose sum is σ = 131668740. Its totient is φ = 131668738.

The previous prime is 131668717. The next prime is 131668741. The reversal of 131668739 is 937866131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131668739 - 2²⁴ = 114891523 is a prime.

Together with 131668741, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131668739.

It is not a weakly prime, because it can be changed into another prime (131668759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65834369 + 65834370.

It is an arithmetic number, because the mean of its divisors is an integer number (65834370).

Almost surely, 2^131668739 is an apocalyptic number.

131668739 is a deficient number, since it is larger than the sum of its proper divisors (1).

131668739 is an equidigital number, since it uses as much as digits as its factorization.

131668739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 44.

The square root of 131668739 is about 11474.6999525042. The cubic root of 131668739 is about 508.7380552064.

The spelling of 131668739 in words is "one hundred thirty-one million, six hundred sixty-eight thousand, seven hundred thirty-nine".