2012429991 has 32 divisors (see below), whose sum is σ = 3176490240. Its totient is φ = 1117209600.

The previous prime is 2012429989. The next prime is 2012430041. The reversal of 2012429991 is 1999242102.

It is not a de Polignac number, because 2012429991 - 2¹ = 2012429989 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012429911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38295 + ... + 74103.

It is an arithmetic number, because the mean of its divisors is an integer number (99265320).

Almost surely, 2^2012429991 is an apocalyptic number.

2012429991 is a deficient number, since it is larger than the sum of its proper divisors (1164060249).

2012429991 is a wasteful number, since it uses less digits than its factorization.

2012429991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35967.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 2012429991 is about 44860.1158157221. The cubic root of 2012429991 is about 1262.5257957151.

The spelling of 2012429991 in words is "two billion, twelve million, four hundred twenty-nine thousand, nine hundred ninety-one".