2956639 has 4 divisors (see below), whose sum is σ = 3379024. Its totient is φ = 2534256.

The previous prime is 2956631. The next prime is 2956649. The reversal of 2956639 is 9366592.

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 2956639 - 2³ = 2956631 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 (2956631) 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, 211182 + ... + 211195.

It is an arithmetic number, because the mean of its divisors is an integer number (844756).

2^2956639 is an apocalyptic number.

2956639 is a deficient number, since it is larger than the sum of its proper divisors (422385).

2956639 is an equidigital number, since it uses as much as digits as its factorization.

2956639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422384.

The product of its digits is 87480, while the sum is 40.

The square root of 2956639 is about 1719.4880051922. The cubic root of 2956639 is about 143.5267223117.

The spelling of 2956639 in words is "two million, nine hundred fifty-six thousand, six hundred thirty-nine".