291130013 has 4 divisors (see below), whose sum is σ = 296064480. Its totient is φ = 286195548.

The previous prime is 291130009. The next prime is 291130051. The reversal of 291130013 is 310031192.

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 not a de Polignac number, because 291130013 - 2² = 291130009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291130513) 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, 2467145 + ... + 2467262.

It is an arithmetic number, because the mean of its divisors is an integer number (74016120).

Almost surely, 2^291130013 is an apocalyptic number.

It is an amenable number.

291130013 is a deficient number, since it is larger than the sum of its proper divisors (4934467).

291130013 is an equidigital number, since it uses as much as digits as its factorization.

291130013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934466.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 291130013 is about 17062.5324322036. The cubic root of 291130013 is about 662.7692133835.

The spelling of 291130013 in words is "two hundred ninety-one million, one hundred thirty thousand, thirteen".