2930639 has 4 divisors (see below), whose sum is σ = 3002160. Its totient is φ = 2859120.

The previous prime is 2930633. The next prime is 2930651. The reversal of 2930639 is 9360392.

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 2930639 - 2²⁰ = 1882063 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 (2930633) 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, 35699 + ... + 35780.

It is an arithmetic number, because the mean of its divisors is an integer number (750540).

2^2930639 is an apocalyptic number.

2930639 is a deficient number, since it is larger than the sum of its proper divisors (71521).

2930639 is an equidigital number, since it uses as much as digits as its factorization.

2930639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71520.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 2930639 is about 1711.9109205797. The cubic root of 2930639 is about 143.1047694243.

The spelling of 2930639 in words is "two million, nine hundred thirty thousand, six hundred thirty-nine".