130686031991 has 4 divisors (see below), whose sum is σ = 130762503000. Its totient is φ = 130609560984.

The previous prime is 130686031967. The next prime is 130686032023. The reversal of 130686031991 is 199130686031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130686031991 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 (130686030991) 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, 38232941 + ... + 38236358.

It is an arithmetic number, because the mean of its divisors is an integer number (32690625750).

Almost surely, 2^130686031991 is an apocalyptic number.

130686031991 is a deficient number, since it is larger than the sum of its proper divisors (76471009).

130686031991 is an equidigital number, since it uses as much as digits as its factorization.

130686031991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76471008.

The product of its (nonzero) digits is 209952, while the sum is 47.

The spelling of 130686031991 in words is "one hundred thirty billion, six hundred eighty-six million, thirty-one thousand, nine hundred ninety-one".