2290691 has 4 divisors (see below), whose sum is σ = 2466912. Its totient is φ = 2114472.

The previous prime is 2290649. The next prime is 2290703. The reversal of 2290691 is 1960922.

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 2290691 - 2⁶ = 2290627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2290091) 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, 88091 + ... + 88116.

It is an arithmetic number, because the mean of its divisors is an integer number (616728).

2^2290691 is an apocalyptic number.

2290691 is a deficient number, since it is larger than the sum of its proper divisors (176221).

2290691 is a wasteful number, since it uses less digits than its factorization.

2290691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176220.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 2290691 is about 1513.5028906480. The cubic root of 2290691 is about 131.8222853333.

The spelling of 2290691 in words is "two million, two hundred ninety thousand, six hundred ninety-one".