2979418821 has 16 divisors (see below), whose sum is σ = 4081842048. Its totient is φ = 1931688000.

The previous prime is 2979418807. The next prime is 2979418867. The reversal of 2979418821 is 1288149792.

It is a happy number.

It is not a de Polignac number, because 2979418821 - 2⁵ = 2979418789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2979418801) 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, 295971 + ... + 305871.

It is an arithmetic number, because the mean of its divisors is an integer number (255115128).

Almost surely, 2^2979418821 is an apocalyptic number.

It is an amenable number.

2979418821 is a deficient number, since it is larger than the sum of its proper divisors (1102423227).

2979418821 is a wasteful number, since it uses less digits than its factorization.

2979418821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12652.

The product of its digits is 580608, while the sum is 51.

The square root of 2979418821 is about 54584.0528084898. The cubic root of 2979418821 is about 1438.9438663147.

The spelling of 2979418821 in words is "two billion, nine hundred seventy-nine million, four hundred eighteen thousand, eight hundred twenty-one".