2154332979 has 6 divisors (see below), whose sum is σ = 3111814316. Its totient is φ = 1436221980.

The previous prime is 2154332969. The next prime is 2154333001. The reversal of 2154332979 is 9792334512.

2154332979 is a `hidden beast` number, since 2 + 1 + 543 + 32 + 9 + 79 = 666.

It is not a de Polignac number, because 2154332979 - 2¹⁹ = 2153808691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154332969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119685157 + ... + 119685174.

Almost surely, 2^2154332979 is an apocalyptic number.

2154332979 is a deficient number, since it is larger than the sum of its proper divisors (957481337).

2154332979 is a wasteful number, since it uses less digits than its factorization.

2154332979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239370337 (or 239370334 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 2154332979 is about 46414.7926743188. The cubic root of 2154332979 is about 1291.5293399745.

The spelling of 2154332979 in words is "two billion, one hundred fifty-four million, three hundred thirty-two thousand, nine hundred seventy-nine".