2638997 has 8 divisors (see below), whose sum is σ = 2773440. Its totient is φ = 2506240.

The previous prime is 2638973. The next prime is 2639041. The reversal of 2638997 is 7998362.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2638997 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 (2638907) 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, 3797 + ... + 4437.

It is an arithmetic number, because the mean of its divisors is an integer number (346680).

2^2638997 is an apocalyptic number.

It is an amenable number.

2638997 is a deficient number, since it is larger than the sum of its proper divisors (134443).

2638997 is a wasteful number, since it uses less digits than its factorization.

2638997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843.

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

The square root of 2638997 is about 1624.4989996919. The cubic root of 2638997 is about 138.1909594678.

The spelling of 2638997 in words is "two million, six hundred thirty-eight thousand, nine hundred ninety-seven".