421838667 has 12 divisors (see below), whose sum is σ = 610200864. Its totient is φ = 280820400.

The previous prime is 421838657. The next prime is 421838671. The reversal of 421838667 is 766838124.

It is not a de Polignac number, because 421838667 - 2⁸ = 421838411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421838617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27123 + ... + 39740.

It is an arithmetic number, because the mean of its divisors is an integer number (50850072).

Almost surely, 2^421838667 is an apocalyptic number.

421838667 is a deficient number, since it is larger than the sum of its proper divisors (188362197).

421838667 is a wasteful number, since it uses less digits than its factorization.

421838667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67570 (or 67567 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 421838667 is about 20538.7114250140. The cubic root of 421838667 is about 749.9784687152.

The spelling of 421838667 in words is "four hundred twenty-one million, eight hundred thirty-eight thousand, six hundred sixty-seven".