2949939891 has 10 divisors (see below), whose sum is σ = 4406700452. Its totient is φ = 1966626540.

The previous prime is 2949939887. The next prime is 2949939899. The reversal of 2949939891 is 1989399492.

2949939891 is a `hidden beast` number, since 29 + 499 + 39 + 8 + 91 = 666.

It is not a de Polignac number, because 2949939891 - 2² = 2949939887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2949939899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18209425 + ... + 18209586.

Almost surely, 2^2949939891 is an apocalyptic number.

2949939891 is a deficient number, since it is larger than the sum of its proper divisors (1456760561).

2949939891 is an equidigital number, since it uses as much as digits as its factorization.

2949939891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36419023 (or 36419014 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 63.

The square root of 2949939891 is about 54313.3491049852. The cubic root of 2949939891 is about 1434.1824009503.

The spelling of 2949939891 in words is "two billion, nine hundred forty-nine million, nine hundred thirty-nine thousand, eight hundred ninety-one".