420630889 has 4 divisors (see below), whose sum is σ = 480721024. Its totient is φ = 360540756.

The previous prime is 420630887. The next prime is 420630943. The reversal of 420630889 is 988036024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420630889 - 2¹ = 420630887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420630887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30045057 + ... + 30045070.

It is an arithmetic number, because the mean of its divisors is an integer number (120180256).

Almost surely, 2^420630889 is an apocalyptic number.

It is an amenable number.

420630889 is a deficient number, since it is larger than the sum of its proper divisors (60090135).

420630889 is an equidigital number, since it uses as much as digits as its factorization.

420630889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60090134.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 420630889 is about 20509.2878715961. The cubic root of 420630889 is about 749.2620231287.

The spelling of 420630889 in words is "four hundred twenty million, six hundred thirty thousand, eight hundred eighty-nine".