2649791 has 4 divisors (see below), whose sum is σ = 2687184. Its totient is φ = 2612400.

The previous prime is 2649781. The next prime is 2649799. The reversal of 2649791 is 1979462.

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 2649791 - 2⁶ = 2649727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649799) 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, 18590 + ... + 18731.

It is an arithmetic number, because the mean of its divisors is an integer number (671796).

2^2649791 is an apocalyptic number.

2649791 is a deficient number, since it is larger than the sum of its proper divisors (37393).

2649791 is an equidigital number, since it uses as much as digits as its factorization.

2649791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37392.

The product of its digits is 27216, while the sum is 38.

The square root of 2649791 is about 1627.8178645045. The cubic root of 2649791 is about 138.3791122820.

The spelling of 2649791 in words is "two million, six hundred forty-nine thousand, seven hundred ninety-one".