2690657 has 2 divisors, whose sum is σ = 2690658. Its totient is φ = 2690656.

The previous prime is 2690629. The next prime is 2690659. The reversal of 2690657 is 7560962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2676496 + 14161 = 1636^2 + 119^2 .

It is a cyclic number.

It is not a de Polignac number, because 2690657 - 2⁶ = 2690593 is a prime.

Together with 2690659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2690659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345328 + 1345329.

It is an arithmetic number, because the mean of its divisors is an integer number (1345329).

2^2690657 is an apocalyptic number.

It is an amenable number.

2690657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2690657 is an equidigital number, since it uses as much as digits as its factorization.

2690657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 2690657 is about 1640.3222244425. The cubic root of 2690657 is about 139.0868632229.

The spelling of 2690657 in words is "two million, six hundred ninety thousand, six hundred fifty-seven".