2749315691 has 4 divisors (see below), whose sum is σ = 2753238384. Its totient is φ = 2745393000.

The previous prime is 2749315601. The next prime is 2749315697. The reversal of 2749315691 is 1965139472.

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 2749315691 - 2²⁶ = 2682206827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2749315697) 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, 1960295 + ... + 1961696.

It is an arithmetic number, because the mean of its divisors is an integer number (688309596).

Almost surely, 2^2749315691 is an apocalyptic number.

2749315691 is a deficient number, since it is larger than the sum of its proper divisors (3922693).

2749315691 is an equidigital number, since it uses as much as digits as its factorization.

2749315691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922692.

The product of its digits is 408240, while the sum is 47.

The square root of 2749315691 is about 52433.9173722506. The cubic root of 2749315691 is about 1400.9034459458.

The spelling of 2749315691 in words is "two billion, seven hundred forty-nine million, three hundred fifteen thousand, six hundred ninety-one".