1913131709 has 8 divisors (see below), whose sum is σ = 1964276160. Its totient is φ = 1862200800.

The previous prime is 1913131691. The next prime is 1913131721. The reversal of 1913131709 is 9071313191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1913131709 - 2²⁸ = 1644696253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913131009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35147 + ... + 71144.

It is an arithmetic number, because the mean of its divisors is an integer number (245534520).

Almost surely, 2^1913131709 is an apocalyptic number.

It is an amenable number.

1913131709 is a deficient number, since it is larger than the sum of its proper divisors (51144451).

1913131709 is a wasteful number, since it uses less digits than its factorization.

1913131709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106771.

The product of its (nonzero) digits is 5103, while the sum is 35.

The square root of 1913131709 is about 43739.3610950137. The cubic root of 1913131709 is about 1241.4091915860.

The spelling of 1913131709 in words is "one billion, nine hundred thirteen million, one hundred thirty-one thousand, seven hundred nine".