421630319 has 8 divisors (see below), whose sum is σ = 479958912. Its totient is φ = 366634840.

The previous prime is 421630301. The next prime is 421630357. The reversal of 421630319 is 913036124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421630319 - 2¹⁶ = 421564783 is a prime.

It is a super-2 number, since 2×421630319² = 355544251800083522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421630291 and 421630300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421630369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 833009 + ... + 833514.

It is an arithmetic number, because the mean of its divisors is an integer number (59994864).

Almost surely, 2^421630319 is an apocalyptic number.

421630319 is a deficient number, since it is larger than the sum of its proper divisors (58328593).

421630319 is a wasteful number, since it uses less digits than its factorization.

421630319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666557.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 421630319 is about 20533.6387179672. The cubic root of 421630319 is about 749.8549758110.

It can be divided in two parts, 42 and 1630319, that added together give a palindrome (1630361).

The spelling of 421630319 in words is "four hundred twenty-one million, six hundred thirty thousand, three hundred nineteen".