421367998 has 4 divisors (see below), whose sum is σ = 632052000. Its totient is φ = 210683998.

The previous prime is 421367957. The next prime is 421368041. The reversal of 421367998 is 899763124.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105341998 + ... + 105342001.

It is an arithmetic number, because the mean of its divisors is an integer number (158013000).

Almost surely, 2^421367998 is an apocalyptic number.

421367998 is a deficient number, since it is larger than the sum of its proper divisors (210684002).

421367998 is a wasteful number, since it uses less digits than its factorization.

421367998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210684001.

The product of its digits is 653184, while the sum is 49.

The square root of 421367998 is about 20527.2501324459. The cubic root of 421367998 is about 749.6994339332.

The spelling of 421367998 in words is "four hundred twenty-one million, three hundred sixty-seven thousand, nine hundred ninety-eight".