2791517491 has 4 divisors (see below), whose sum is σ = 3190305712. Its totient is φ = 2392729272.

The previous prime is 2791517471. The next prime is 2791517497. The reversal of 2791517491 is 1947151972.

2791517491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2791517491 - 2⁵ = 2791517459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2791517497) 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, 199394100 + ... + 199394113.

It is an arithmetic number, because the mean of its divisors is an integer number (797576428).

Almost surely, 2^2791517491 is an apocalyptic number.

2791517491 is a deficient number, since it is larger than the sum of its proper divisors (398788221).

2791517491 is an equidigital number, since it uses as much as digits as its factorization.

2791517491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398788220.

The product of its digits is 158760, while the sum is 46.

The square root of 2791517491 is about 52834.8132484634. The cubic root of 2791517491 is about 1408.0350025397.

The spelling of 2791517491 in words is "two billion, seven hundred ninety-one million, five hundred seventeen thousand, four hundred ninety-one".