2649659 has 4 divisors (see below), whose sum is σ = 2664480. Its totient is φ = 2634840.

The previous prime is 2649613. The next prime is 2649677. The reversal of 2649659 is 9569462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2649659 - 2⁸ = 2649403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2649679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7139 + ... + 7500.

It is an arithmetic number, because the mean of its divisors is an integer number (666120).

2^2649659 is an apocalyptic number.

2649659 is a deficient number, since it is larger than the sum of its proper divisors (14821).

2649659 is a wasteful number, since it uses less digits than its factorization.

2649659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14820.

The product of its digits is 116640, while the sum is 41.

The square root of 2649659 is about 1627.7773189230. Note that the first 3 decimals coincide. The cubic root of 2649659 is about 138.3768144472.

The spelling of 2649659 in words is "two million, six hundred forty-nine thousand, six hundred fifty-nine".