2990639 has 2 divisors, whose sum is σ = 2990640. Its totient is φ = 2990638.

The previous prime is 2990629. The next prime is 2990677. The reversal of 2990639 is 9360992.

It is an a-pointer prime, because the next prime (2990677) can be obtained adding 2990639 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2990639 - 2¹⁶ = 2925103 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2990609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1495319 + 1495320.

It is an arithmetic number, because the mean of its divisors is an integer number (1495320).

2^2990639 is an apocalyptic number.

2990639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2990639 is an equidigital number, since it uses as much as digits as its factorization.

2990639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 2990639 is about 1729.3464083289. The cubic root of 2990639 is about 144.0747907523.

The spelling of 2990639 in words is "two million, nine hundred ninety thousand, six hundred thirty-nine".