131842709 has 2 divisors, whose sum is σ = 131842710. Its totient is φ = 131842708.

The previous prime is 131842681. The next prime is 131842759. The reversal of 131842709 is 907248131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130462084 + 1380625 = 11422^2 + 1175^2 .

It is an emirp because it is prime and its reverse (907248131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131842709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131842759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65921354 + 65921355.

It is an arithmetic number, because the mean of its divisors is an integer number (65921355).

Almost surely, 2^131842709 is an apocalyptic number.

It is an amenable number.

131842709 is a deficient number, since it is larger than the sum of its proper divisors (1).

131842709 is an equidigital number, since it uses as much as digits as its factorization.

131842709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 131842709 is about 11482.2780405284. The cubic root of 131842709 is about 508.9620167657.

The spelling of 131842709 in words is "one hundred thirty-one million, eight hundred forty-two thousand, seven hundred nine".