2690689 has 2 divisors, whose sum is σ = 2690690. Its totient is φ = 2690688.

The previous prime is 2690671. The next prime is 2690711. The reversal of 2690689 is 9860962.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2689600 + 1089 = 1640^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 2690689 - 2⁵ = 2690657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2690629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345344 + 1345345.

It is an arithmetic number, because the mean of its divisors is an integer number (1345345).

2^2690689 is an apocalyptic number.

It is an amenable number.

2690689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2690689 is an equidigital number, since it uses as much as digits as its factorization.

2690689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 2690689 is about 1640.3319785946. The cubic root of 2690689 is about 139.0874146077.

The spelling of 2690689 in words is "two million, six hundred ninety thousand, six hundred eighty-nine".