131912709 has 4 divisors (see below), whose sum is σ = 175883616. Its totient is φ = 87941804.

The previous prime is 131912653. The next prime is 131912743. The reversal of 131912709 is 907219131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131912709 - 2⁷ = 131912581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131912709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131912789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21985449 + ... + 21985454.

It is an arithmetic number, because the mean of its divisors is an integer number (43970904).

Almost surely, 2^131912709 is an apocalyptic number.

It is an amenable number.

131912709 is a deficient number, since it is larger than the sum of its proper divisors (43970907).

131912709 is an equidigital number, since it uses as much as digits as its factorization.

131912709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43970906.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 131912709 is about 11485.3258116607. The cubic root of 131912709 is about 509.0520761959.

It can be divided in two parts, 1319 and 12709, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 131912709 in words is "one hundred thirty-one million, nine hundred twelve thousand, seven hundred nine".