2978819121 has 16 divisors (see below), whose sum is σ = 4026193920. Its totient is φ = 1958740560.

The previous prime is 2978819089. The next prime is 2978819131. The reversal of 2978819121 is 1219188792.

It is not a de Polignac number, because 2978819121 - 2⁵ = 2978819089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2978819131) 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, 147640 + ... + 166598.

It is an arithmetic number, because the mean of its divisors is an integer number (251637120).

Almost surely, 2^2978819121 is an apocalyptic number.

It is an amenable number.

2978819121 is a deficient number, since it is larger than the sum of its proper divisors (1047374799).

2978819121 is a wasteful number, since it uses less digits than its factorization.

2978819121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19676.

The product of its digits is 145152, while the sum is 48.

The square root of 2978819121 is about 54578.5591693295. The cubic root of 2978819121 is about 1438.8473158808.

The spelling of 2978819121 in words is "two billion, nine hundred seventy-eight million, eight hundred nineteen thousand, one hundred twenty-one".