421636347 has 24 divisors (see below), whose sum is σ = 689008320. Its totient is φ = 255535560.

The previous prime is 421636297. The next prime is 421636357. The reversal of 421636347 is 743636124.

It is a happy number.

421636347 is a `hidden beast` number, since 4 + 2 + 16 + 3 + 634 + 7 = 666.

It is not a de Polignac number, because 421636347 - 2⁷ = 421636219 is a prime.

It is a super-2 number, since 2×421636347² = 355554418223008818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421636357) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76197 + ... + 81542.

It is an arithmetic number, because the mean of its divisors is an integer number (28708680).

Almost surely, 2^421636347 is an apocalyptic number.

421636347 is a deficient number, since it is larger than the sum of its proper divisors (267371973).

421636347 is a wasteful number, since it uses less digits than its factorization.

421636347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157765 (or 157753 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 421636347 is about 20533.7855009738. The cubic root of 421636347 is about 749.8585493240.

The spelling of 421636347 in words is "four hundred twenty-one million, six hundred thirty-six thousand, three hundred forty-seven".