2649679 has 2 divisors, whose sum is σ = 2649680. Its totient is φ = 2649678.

The previous prime is 2649677. The next prime is 2649709. The reversal of 2649679 is 9769462.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2649679 - 2¹ = 2649677 is a prime.

Together with 2649677, it forms a pair of twin primes.

2649679 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2649677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324839 + 1324840.

It is an arithmetic number, because the mean of its divisors is an integer number (1324840).

2^2649679 is an apocalyptic number.

2649679 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649679 is an equidigital number, since it uses as much as digits as its factorization.

2649679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 43.

The square root of 2649679 is about 1627.7834622578. The cubic root of 2649679 is about 138.3771626089.

The spelling of 2649679 in words is "two million, six hundred forty-nine thousand, six hundred seventy-nine".