130691309 has 4 divisors (see below), whose sum is σ = 149361504. Its totient is φ = 112021116.

The previous prime is 130691299. The next prime is 130691311. The reversal of 130691309 is 903196031.

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 a de Polignac number, because none of the positive numbers 2^k-130691309 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 (130691369) 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, 9335087 + ... + 9335100.

It is an arithmetic number, because the mean of its divisors is an integer number (37340376).

Almost surely, 2^130691309 is an apocalyptic number.

It is an amenable number.

130691309 is a deficient number, since it is larger than the sum of its proper divisors (18670195).

130691309 is an equidigital number, since it uses as much as digits as its factorization.

130691309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18670194.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 130691309 is about 11432.0299597228. The cubic root of 130691309 is about 507.4760715744.

The spelling of 130691309 in words is "one hundred thirty million, six hundred ninety-one thousand, three hundred nine".