2699689 has 2 divisors, whose sum is σ = 2699690. Its totient is φ = 2699688.

The previous prime is 2699687. The next prime is 2699701. The reversal of 2699689 is 9869962.

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., 2152089 + 547600 = 1467^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 2699689 - 2¹ = 2699687 is a prime.

Together with 2699687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2699687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1349844 + 1349845.

It is an arithmetic number, because the mean of its divisors is an integer number (1349845).

2^2699689 is an apocalyptic number.

It is an amenable number.

2699689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2699689 is an equidigital number, since it uses as much as digits as its factorization.

2699689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 49.

The square root of 2699689 is about 1643.0730355039. The cubic root of 2699689 is about 139.2423183804.

The spelling of 2699689 in words is "two million, six hundred ninety-nine thousand, six hundred eighty-nine".