2718991 has 12 divisors (see below), whose sum is σ = 3121776. Its totient is φ = 2361920.

The previous prime is 2718983. The next prime is 2719001. The reversal of 2718991 is 1998172.

It is not a de Polignac number, because 2718991 - 2³ = 2718983 is a prime.

It is a Duffinian number.

2718991 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2718991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2718901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2295 + ... + 3271.

It is an arithmetic number, because the mean of its divisors is an integer number (260148).

2^2718991 is an apocalyptic number.

2718991 is a deficient number, since it is larger than the sum of its proper divisors (402785).

2718991 is a wasteful number, since it uses less digits than its factorization.

2718991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022 (or 1011 counting only the distinct ones).

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

The square root of 2718991 is about 1648.9363238161. The cubic root of 2718991 is about 139.5733781470.

The spelling of 2718991 in words is "two million, seven hundred eighteen thousand, nine hundred ninety-one".