291130012 has 12 divisors (see below), whose sum is σ = 521904096. Its totient is φ = 142014560.

The previous prime is 291130009. The next prime is 291130051. The reversal of 291130012 is 210031192.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 887428 + ... + 887755.

It is an arithmetic number, because the mean of its divisors is an integer number (43492008).

Almost surely, 2^291130012 is an apocalyptic number.

It is an amenable number.

291130012 is a deficient number, since it is larger than the sum of its proper divisors (230774084).

291130012 is a wasteful number, since it uses less digits than its factorization.

291130012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1775228 (or 1775226 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 291130012 is about 17062.5324028996. The cubic root of 291130012 is about 662.7692126246.

It can be divided in two parts, 2911 and 30012, that added together give a palindrome (32923).

The spelling of 291130012 in words is "two hundred ninety-one million, one hundred thirty thousand, twelve".