2689637 has 2 divisors, whose sum is σ = 2689638. Its totient is φ = 2689636.

The previous prime is 2689619. The next prime is 2689649. The reversal of 2689637 is 7369862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2172676 + 516961 = 1474^2 + 719^2 .

It is a cyclic number.

It is not a de Polignac number, because 2689637 - 2⁶ = 2689573 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2 + 6⁵ + 8⁷ + 9⁴ + 6⁶ + 3¹² + 7² .

It is a junction number, because it is equal to n+sod(n) for n = 2689594 and 2689603.

It is a congruent number.

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, 1344818 + 1344819.

It is an arithmetic number, because the mean of its divisors is an integer number (1344819).

2^2689637 is an apocalyptic number.

It is an amenable number.

2689637 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689637 is an equidigital number, since it uses as much as digits as its factorization.

2689637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 2689637 is about 1640.0112804490. The cubic root of 2689637 is about 139.0692855419.

The spelling of 2689637 in words is "two million, six hundred eighty-nine thousand, six hundred thirty-seven".