2978319421 has 16 divisors (see below), whose sum is σ = 3789014400. Its totient is φ = 2320765440.

The previous prime is 2978319419. The next prime is 2978319433. The reversal of 2978319421 is 1249138792.

It is a happy number.

It is not a de Polignac number, because 2978319421 - 2¹ = 2978319419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978319221) 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, 390916 + ... + 398461.

It is an arithmetic number, because the mean of its divisors is an integer number (236813400).

Almost surely, 2^2978319421 is an apocalyptic number.

It is an amenable number.

2978319421 is a deficient number, since it is larger than the sum of its proper divisors (810694979).

2978319421 is an equidigital number, since it uses as much as digits as its factorization.

2978319421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789409 (or 789395 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 2978319421 is about 54573.9811723499. The cubic root of 2978319421 is about 1438.7668553378.

The spelling of 2978319421 in words is "two billion, nine hundred seventy-eight million, three hundred nineteen thousand, four hundred twenty-one".