2792899981 has 4 divisors (see below), whose sum is σ = 2793680892. Its totient is φ = 2792119072.

The previous prime is 2792899979. The next prime is 2792899997. The reversal of 2792899981 is 1899982972.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2092239081 + 700660900 = 45741^2 + 26470^2 .

It is a cyclic number.

It is not a de Polignac number, because 2792899981 - 2¹ = 2792899979 is a prime.

It is a super-2 number, since 2×2792899981² = 15600580607739600722, 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 (2792879981) 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, 385066 + ... + 392251.

It is an arithmetic number, because the mean of its divisors is an integer number (698420223).

Almost surely, 2^2792899981 is an apocalyptic number.

It is an amenable number.

2792899981 is a deficient number, since it is larger than the sum of its proper divisors (780911).

2792899981 is an equidigital number, since it uses as much as digits as its factorization.

2792899981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780910.

The product of its digits is 11757312, while the sum is 64.

The square root of 2792899981 is about 52847.8947641247. The cubic root of 2792899981 is about 1408.2674057705.

The spelling of 2792899981 in words is "two billion, seven hundred ninety-two million, eight hundred ninety-nine thousand, nine hundred eighty-one".