2691089 has 4 divisors (see below), whose sum is σ = 2709300. Its totient is φ = 2672880.

The previous prime is 2691067. The next prime is 2691097. The reversal of 2691089 is 9801962.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1210000 + 1481089 = 1100^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 2691089 - 2¹² = 2686993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2691019) 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, 8882 + ... + 9179.

It is an arithmetic number, because the mean of its divisors is an integer number (677325).

2^2691089 is an apocalyptic number.

It is an amenable number.

2691089 is a deficient number, since it is larger than the sum of its proper divisors (18211).

2691089 is a wasteful number, since it uses less digits than its factorization.

2691089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18210.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 2691089 is about 1640.4539006019. The cubic root of 2691089 is about 139.0943065486.

The spelling of 2691089 in words is "two million, six hundred ninety-one thousand, eighty-nine".