420002039 has 2 divisors, whose sum is σ = 420002040. Its totient is φ = 420002038.

The previous prime is 420002021. The next prime is 420002083. The reversal of 420002039 is 930200024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420002039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420002039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420002939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210001019 + 210001020.

It is an arithmetic number, because the mean of its divisors is an integer number (210001020).

Almost surely, 2^420002039 is an apocalyptic number.

420002039 is a deficient number, since it is larger than the sum of its proper divisors (1).

420002039 is an equidigital number, since it uses as much as digits as its factorization.

420002039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 420002039 is about 20493.9512783650. The cubic root of 420002039 is about 748.8884506096. Note that the first 3 decimals are identical.

The spelling of 420002039 in words is "four hundred twenty million, two thousand, thirty-nine".