2690691 has 4 divisors (see below), whose sum is σ = 3587592. Its totient is φ = 1793792.

The previous prime is 2690689. The next prime is 2690711. The reversal of 2690691 is 1960962.

It is a happy number.

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 2690691 - 2¹ = 2690689 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2690621) 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, 448446 + ... + 448451.

It is an arithmetic number, because the mean of its divisors is an integer number (896898).

2^2690691 is an apocalyptic number.

2690691 is a deficient number, since it is larger than the sum of its proper divisors (896901).

2690691 is an equidigital number, since it uses as much as digits as its factorization.

2690691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896900.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 2690691 is about 1640.3325882272. The cubic root of 2690691 is about 139.0874490691.

The spelling of 2690691 in words is "two million, six hundred ninety thousand, six hundred ninety-one".