421373863 has 2 divisors, whose sum is σ = 421373864. Its totient is φ = 421373862.

The previous prime is 421373861. The next prime is 421373879. The reversal of 421373863 is 368373124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421373863 - 2¹ = 421373861 is a prime.

Together with 421373861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421373861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210686931 + 210686932.

It is an arithmetic number, because the mean of its divisors is an integer number (210686932).

Almost surely, 2^421373863 is an apocalyptic number.

421373863 is a deficient number, since it is larger than the sum of its proper divisors (1).

421373863 is an equidigital number, since it uses as much as digits as its factorization.

421373863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 421373863 is about 20527.3929908306. The cubic root of 421373863 is about 749.7029122600.

The spelling of 421373863 in words is "four hundred twenty-one million, three hundred seventy-three thousand, eight hundred sixty-three".