421319963 has 4 divisors (see below), whose sum is σ = 421975848. Its totient is φ = 420664080.

The previous prime is 421319953. The next prime is 421319971. The reversal of 421319963 is 369913124.

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

It is a cyclic number.

It is not a de Polignac number, because 421319963 - 2⁸ = 421319707 is a prime.

It is a super-2 number, since 2×421319963² = 355021022444642738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421319903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326978 + ... + 328263.

It is an arithmetic number, because the mean of its divisors is an integer number (105493962).

Almost surely, 2^421319963 is an apocalyptic number.

421319963 is a deficient number, since it is larger than the sum of its proper divisors (655885).

421319963 is an equidigital number, since it uses as much as digits as its factorization.

421319963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655884.

The product of its digits is 34992, while the sum is 38.

The square root of 421319963 is about 20526.0800690244. The cubic root of 421319963 is about 749.6709448366.

The spelling of 421319963 in words is "four hundred twenty-one million, three hundred nineteen thousand, nine hundred sixty-three".