2420644439 has 2 divisors, whose sum is σ = 2420644440. Its totient is φ = 2420644438.

The previous prime is 2420644427. The next prime is 2420644481. The reversal of 2420644439 is 9344460242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2420644439 - 2⁸ = 2420644183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2420644489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210322219 + 1210322220.

It is an arithmetic number, because the mean of its divisors is an integer number (1210322220).

Almost surely, 2^2420644439 is an apocalyptic number.

2420644439 is a deficient number, since it is larger than the sum of its proper divisors (1).

2420644439 is an equidigital number, since it uses as much as digits as its factorization.

2420644439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 38.

The square root of 2420644439 is about 49200.0451117679. The cubic root of 2420644439 is about 1342.6938529257.

The spelling of 2420644439 in words is "two billion, four hundred twenty million, six hundred forty-four thousand, four hundred thirty-nine".