420551039 has 2 divisors, whose sum is σ = 420551040. Its totient is φ = 420551038.

The previous prime is 420551023. The next prime is 420551041. The reversal of 420551039 is 930155024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420551039 - 2⁴ = 420551023 is a prime.

Together with 420551041, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420551059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210275519 + 210275520.

It is an arithmetic number, because the mean of its divisors is an integer number (210275520).

Almost surely, 2^420551039 is an apocalyptic number.

420551039 is a deficient number, since it is larger than the sum of its proper divisors (1).

420551039 is an equidigital number, since it uses as much as digits as its factorization.

420551039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 420551039 is about 20507.3411002012. The cubic root of 420551039 is about 749.2146083522.

The spelling of 420551039 in words is "four hundred twenty million, five hundred fifty-one thousand, thirty-nine".