420416171999 has 4 divisors (see below), whose sum is σ = 420417552336. Its totient is φ = 420414791664.

The previous prime is 420416171951. The next prime is 420416172019. The reversal of 420416171999 is 999171614024.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 420416171999 - 2⁸ = 420416171743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420416171999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420416171299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9614 + ... + 917019.

It is an arithmetic number, because the mean of its divisors is an integer number (105104388084).

Almost surely, 2^420416171999 is an apocalyptic number.

420416171999 is a deficient number, since it is larger than the sum of its proper divisors (1380337).

420416171999 is an equidigital number, since it uses as much as digits as its factorization.

420416171999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380336.

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 420416171999 in words is "four hundred twenty billion, four hundred sixteen million, one hundred seventy-one thousand, nine hundred ninety-nine".