2949115821 has 64 divisors (see below), whose sum is σ = 4437573120. Its totient is φ = 1735050240.

The previous prime is 2949115801. The next prime is 2949115843. The reversal of 2949115821 is 1285119492.

It is not a de Polignac number, because 2949115821 - 2⁷ = 2949115693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2949115801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4515931 + ... + 4516583.

It is an arithmetic number, because the mean of its divisors is an integer number (69337080).

Almost surely, 2^2949115821 is an apocalyptic number.

It is an amenable number.

2949115821 is a deficient number, since it is larger than the sum of its proper divisors (1488457299).

2949115821 is a wasteful number, since it uses less digits than its factorization.

2949115821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806.

The product of its digits is 51840, while the sum is 42.

The square root of 2949115821 is about 54305.7623185606. The cubic root of 2949115821 is about 1434.0488415329.

The spelling of 2949115821 in words is "two billion, nine hundred forty-nine million, one hundred fifteen thousand, eight hundred twenty-one".