2799121491 has 6 divisors (see below), whose sum is σ = 4043175500. Its totient is φ = 1866080988.

The previous prime is 2799121487. The next prime is 2799121513. The reversal of 2799121491 is 1941219972.

It is a happy number.

2799121491 is a `hidden beast` number, since 2 + 79 + 91 + 2 + 1 + 491 = 666.

It is not a de Polignac number, because 2799121491 - 2² = 2799121487 is a prime.

It is a super-2 number, since 2×2799121491² = 15670162242756126162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2799120491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155506741 + ... + 155506758.

Almost surely, 2^2799121491 is an apocalyptic number.

2799121491 is a deficient number, since it is larger than the sum of its proper divisors (1244054009).

2799121491 is a wasteful number, since it uses less digits than its factorization.

2799121491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311013505 (or 311013502 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 2799121491 is about 52906.7244402826. The cubic root of 2799121491 is about 1409.3123234851.

The spelling of 2799121491 in words is "two billion, seven hundred ninety-nine million, one hundred twenty-one thousand, four hundred ninety-one".