2638979 has 8 divisors (see below), whose sum is σ = 3029088. Its totient is φ = 2252160.

The previous prime is 2638973. The next prime is 2639041. The reversal of 2638979 is 9798362.

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 2638979 - 2¹² = 2634883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2638973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1259 + ... + 2619.

It is an arithmetic number, because the mean of its divisors is an integer number (378636).

2^2638979 is an apocalyptic number.

2638979 is a deficient number, since it is larger than the sum of its proper divisors (390109).

2638979 is a wasteful number, since it uses less digits than its factorization.

2638979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645.

The product of its digits is 163296, while the sum is 44.

The square root of 2638979 is about 1624.4934595128. The cubic root of 2638979 is about 138.1906452773.

The spelling of 2638979 in words is "two million, six hundred thirty-eight thousand, nine hundred seventy-nine".