2979556381 has 4 divisors (see below), whose sum is σ = 2997836032. Its totient is φ = 2961276732.

The previous prime is 2979556361. The next prime is 2979556403. The reversal of 2979556381 is 1836559792.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2979556381 - 2²¹ = 2977459229 is a prime.

It is a super-2 number, since 2×2979556381² = 17755512455115634322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2979556361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9139581 + ... + 9139906.

It is an arithmetic number, because the mean of its divisors is an integer number (749459008).

Almost surely, 2^2979556381 is an apocalyptic number.

It is an amenable number.

2979556381 is a deficient number, since it is larger than the sum of its proper divisors (18279651).

2979556381 is a wasteful number, since it uses less digits than its factorization.

2979556381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18279650.

The product of its digits is 4082400, while the sum is 55.

The square root of 2979556381 is about 54585.3128689394. The cubic root of 2979556381 is about 1438.9660113575.

The spelling of 2979556381 in words is "two billion, nine hundred seventy-nine million, five hundred fifty-six thousand, three hundred eighty-one".