421367997 has 16 divisors (see below), whose sum is σ = 592090560. Its totient is φ = 265813632.

The previous prime is 421367957. The next prime is 421368041. The reversal of 421367997 is 799763124.

It is a happy number.

It is not a de Polignac number, because 421367997 - 2¹¹ = 421365949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421367957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50443 + ... + 58199.

It is an arithmetic number, because the mean of its divisors is an integer number (37005660).

Almost surely, 2^421367997 is an apocalyptic number.

It is an amenable number.

421367997 is a deficient number, since it is larger than the sum of its proper divisors (170722563).

421367997 is a wasteful number, since it uses less digits than its factorization.

421367997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8732.

The product of its digits is 571536, while the sum is 48.

The square root of 421367997 is about 20527.2501080880. The cubic root of 421367997 is about 749.6994333401.

The spelling of 421367997 in words is "four hundred twenty-one million, three hundred sixty-seven thousand, nine hundred ninety-seven".