420989627 has 2 divisors, whose sum is σ = 420989628. Its totient is φ = 420989626.

The previous prime is 420989587. The next prime is 420989659. The reversal of 420989627 is 726989024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420989627 - 2²⁰ = 419941051 is a prime.

It is not a weakly prime, because it can be changed into another prime (420989687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210494813 + 210494814.

It is an arithmetic number, because the mean of its divisors is an integer number (210494814).

Almost surely, 2^420989627 is an apocalyptic number.

420989627 is a deficient number, since it is larger than the sum of its proper divisors (1).

420989627 is an equidigital number, since it uses as much as digits as its factorization.

420989627 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 420989627 is about 20518.0317525829. The cubic root of 420989627 is about 749.4749670582.

The spelling of 420989627 in words is "four hundred twenty million, nine hundred eighty-nine thousand, six hundred twenty-seven".