2999278921 has 8 divisors (see below), whose sum is σ = 3021120000. Its totient is φ = 2977502160.

The previous prime is 2999278903. The next prime is 2999278943. The reversal of 2999278921 is 1298729992.

2999278921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2999278921 - 2²⁷ = 2865061193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2999278721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79575 + ... + 111043.

It is an arithmetic number, because the mean of its divisors is an integer number (377640000).

Almost surely, 2^2999278921 is an apocalyptic number.

It is an amenable number.

2999278921 is a deficient number, since it is larger than the sum of its proper divisors (21841079).

2999278921 is a wasteful number, since it uses less digits than its factorization.

2999278921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32159.

The product of its digits is 2939328, while the sum is 58.

The square root of 2999278921 is about 54765.6728343586. The cubic root of 2999278921 is about 1442.1340081728.

The spelling of 2999278921 in words is "two billion, nine hundred ninety-nine million, two hundred seventy-eight thousand, nine hundred twenty-one".