2639797 has 4 divisors (see below), whose sum is σ = 2664576. Its totient is φ = 2615020.

The previous prime is 2639789. The next prime is 2639801. The reversal of 2639797 is 7979362.

2639797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2639797 - 2³ = 2639789 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 6 + 3⁷ + 9⁴ + 7² + 9⁶ + 7⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12229 + ... + 12442.

It is an arithmetic number, because the mean of its divisors is an integer number (666144).

2^2639797 is an apocalyptic number.

It is an amenable number.

2639797 is a deficient number, since it is larger than the sum of its proper divisors (24779).

2639797 is a wasteful number, since it uses less digits than its factorization.

2639797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24778.

The product of its digits is 142884, while the sum is 43.

The square root of 2639797 is about 1624.7452107946. The cubic root of 2639797 is about 138.2049220450.

The spelling of 2639797 in words is "two million, six hundred thirty-nine thousand, seven hundred ninety-seven".