2691659 has 2 divisors, whose sum is σ = 2691660. Its totient is φ = 2691658.

The previous prime is 2691641. The next prime is 2691677. The reversal of 2691659 is 9561962.

It is a balanced prime because it is at equal distance from previous prime (2691641) and next prime (2691677).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2691659 is a prime.

It is not a weakly prime, because it can be changed into another prime (2691959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345829 + 1345830.

It is an arithmetic number, because the mean of its divisors is an integer number (1345830).

2^2691659 is an apocalyptic number.

2691659 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691659 is an equidigital number, since it uses as much as digits as its factorization.

2691659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 38.

The square root of 2691659 is about 1640.6276238074. The cubic root of 2691659 is about 139.1041263846.

The spelling of 2691659 in words is "two million, six hundred ninety-one thousand, six hundred fifty-nine".