421968583 has 2 divisors, whose sum is σ = 421968584. Its totient is φ = 421968582.

The previous prime is 421968553. The next prime is 421968593. The reversal of 421968583 is 385869124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421968583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421968553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210984291 + 210984292.

It is an arithmetic number, because the mean of its divisors is an integer number (210984292).

Almost surely, 2^421968583 is an apocalyptic number.

421968583 is a deficient number, since it is larger than the sum of its proper divisors (1).

421968583 is an equidigital number, since it uses as much as digits as its factorization.

421968583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 46.

The square root of 421968583 is about 20541.8738921258. The cubic root of 421968583 is about 750.0554524925.

The spelling of 421968583 in words is "four hundred twenty-one million, nine hundred sixty-eight thousand, five hundred eighty-three".