2639791 has 8 divisors (see below), whose sum is σ = 3291264. Its totient is φ = 2056920.

The previous prime is 2639789. The next prime is 2639801. The reversal of 2639791 is 1979362.

2639791 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2639791 - 2¹ = 2639789 is a prime.

It is a Duffinian number.

2639791 is strictly pandigital in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 2639791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17065 + ... + 17218.

It is an arithmetic number, because the mean of its divisors is an integer number (411408).

2^2639791 is an apocalyptic number.

2639791 is a deficient number, since it is larger than the sum of its proper divisors (651473).

2639791 is a wasteful number, since it uses less digits than its factorization.

2639791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34301.

The product of its digits is 20412, while the sum is 37.

The square root of 2639791 is about 1624.7433643502. The cubic root of 2639791 is about 138.2048173362.

The spelling of 2639791 in words is "two million, six hundred thirty-nine thousand, seven hundred ninety-one".