420739651 has 2 divisors, whose sum is σ = 420739652. Its totient is φ = 420739650.

The previous prime is 420739619. The next prime is 420739721. The reversal of 420739651 is 156937024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420739651 - 2⁵ = 420739619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420739651.

It is not a weakly prime, because it can be changed into another prime (420739601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210369825 + 210369826.

It is an arithmetic number, because the mean of its divisors is an integer number (210369826).

Almost surely, 2^420739651 is an apocalyptic number.

420739651 is a deficient number, since it is larger than the sum of its proper divisors (1).

420739651 is an equidigital number, since it uses as much as digits as its factorization.

420739651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 420739651 is about 20511.9392306042. The cubic root of 420739651 is about 749.3265961432.

The spelling of 420739651 in words is "four hundred twenty million, seven hundred thirty-nine thousand, six hundred fifty-one".