2918791 has 4 divisors (see below), whose sum is σ = 2931552. Its totient is φ = 2906032.

The previous prime is 2918779. The next prime is 2918803. The reversal of 2918791 is 1978192.

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

It is an interprime number because it is at equal distance from previous prime (2918779) and next prime (2918803).

It is a cyclic number.

It is not a de Polignac number, because 2918791 - 2¹³ = 2910599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2918791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2918731) 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, 6031 + ... + 6496.

It is an arithmetic number, because the mean of its divisors is an integer number (732888).

2^2918791 is an apocalyptic number.

2918791 is a deficient number, since it is larger than the sum of its proper divisors (12761).

2918791 is a wasteful number, since it uses less digits than its factorization.

2918791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12760.

The product of its digits is 9072, while the sum is 37.

The square root of 2918791 is about 1708.4469555711. The cubic root of 2918791 is about 142.9116607634.

The spelling of 2918791 in words is "two million, nine hundred eighteen thousand, seven hundred ninety-one".