2979958921 has 9 divisors (see below), whose sum is σ = 3022531533. Its totient is φ = 2937979980.

The previous prime is 2979958901. The next prime is 2979958931. The reversal of 2979958921 is 1298599792.

The square root of 2979958921 is 54589.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 2979958921 - 2¹⁵ = 2979926153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2979958921.

It is not an unprimeable number, because it can be changed into a prime (2979958901) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4312186 + ... + 4312876.

It is an arithmetic number, because the mean of its divisors is an integer number (335836837).

Almost surely, 2^2979958921 is an apocalyptic number.

2979958921 is the 54589-th square number.

2979958921 is the 27295-th centered octagonal number.

It is an amenable number.

2979958921 is a deficient number, since it is larger than the sum of its proper divisors (42572612).

2979958921 is an frugal number, since it uses more digits than its factorization.

2979958921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 770 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 61.

The cubic root of 2979958921 is about 1439.0308101867.

It can be divided in two parts, 297995 and 8921, that added together give a square (306916 = 554²).

The spelling of 2979958921 in words is "two billion, nine hundred seventy-nine million, nine hundred fifty-eight thousand, nine hundred twenty-one".