2012909191 has 16 divisors (see below), whose sum is σ = 2245557600. Its totient is φ = 1793138688.

The previous prime is 2012909141. The next prime is 2012909203. The reversal of 2012909191 is 1919092102.

It is a cyclic number.

It is not a de Polignac number, because 2012909191 - 2¹³ = 2012900999 is a prime.

It is a super-2 number, since 2×2012909191² = 8103606822424548962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012909131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467175 + ... + 471463.

It is an arithmetic number, because the mean of its divisors is an integer number (140347350).

Almost surely, 2^2012909191 is an apocalyptic number.

2012909191 is a deficient number, since it is larger than the sum of its proper divisors (232648409).

2012909191 is a wasteful number, since it uses less digits than its factorization.

2012909191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5778.

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 2012909191 is about 44865.4565450971. The cubic root of 2012909191 is about 1262.6259986786.

The spelling of 2012909191 in words is "two billion, twelve million, nine hundred nine thousand, one hundred ninety-one".