2689651 has 2 divisors, whose sum is σ = 2689652. Its totient is φ = 2689650.

The previous prime is 2689649. The next prime is 2689657. The reversal of 2689651 is 1569862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2689651 - 2¹ = 2689649 is a prime.

Together with 2689649, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2689651.

It is not a weakly prime, because it can be changed into another prime (2689657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344825 + 1344826.

It is an arithmetic number, because the mean of its divisors is an integer number (1344826).

2^2689651 is an apocalyptic number.

2689651 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689651 is an equidigital number, since it uses as much as digits as its factorization.

2689651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 2689651 is about 1640.0155487068. The cubic root of 2689651 is about 139.0695268343.

The spelling of 2689651 in words is "two million, six hundred eighty-nine thousand, six hundred fifty-one".