2787091 has 6 divisors (see below), whose sum is σ = 2941460. Its totient is φ = 2633508.

The previous prime is 2787073. The next prime is 2787097. The reversal of 2787091 is 1907872.

It is not a de Polignac number, because 2787091 - 2⁹ = 2786579 is a prime.

It is a super-3 number, since 3×2787091³ = 64949333891925583713, which contains 333 as substring.

It is a Duffinian number.

2787091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2787097) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7086 + ... + 7468.

2^2787091 is an apocalyptic number.

2787091 is a deficient number, since it is larger than the sum of its proper divisors (154369).

2787091 is an frugal number, since it uses more digits than its factorization.

2787091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 2787091 is about 1669.4582953761. The cubic root of 2787091 is about 140.7290371522.

The spelling of 2787091 in words is "two million, seven hundred eighty-seven thousand, ninety-one".