420516789 has 16 divisors (see below), whose sum is σ = 699041280. Its totient is φ = 218450160.

The previous prime is 420516779. The next prime is 420516799. The reversal of 420516789 is 987615024.

It is an interprime number because it is at equal distance from previous prime (420516779) and next prime (420516799).

It is not a de Polignac number, because 420516789 - 2⁸ = 420516533 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 420516789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420516779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 909979 + ... + 910440.

It is an arithmetic number, because the mean of its divisors is an integer number (43690080).

Almost surely, 2^420516789 is an apocalyptic number.

It is an amenable number.

420516789 is a deficient number, since it is larger than the sum of its proper divisors (278524491).

420516789 is a wasteful number, since it uses less digits than its factorization.

420516789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820440.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 420516789 is about 20506.5060163842. The cubic root of 420516789 is about 749.1942689288.

The spelling of 420516789 in words is "four hundred twenty million, five hundred sixteen thousand, seven hundred eighty-nine".