421002319 has 2 divisors, whose sum is σ = 421002320. Its totient is φ = 421002318.

The previous prime is 421002313. The next prime is 421002343. The reversal of 421002319 is 913200124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421002319 - 2¹⁷ = 420871247 is a prime.

It is a super-2 number, since 2×421002319² = 354485905206755522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421002319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421002313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210501159 + 210501160.

It is an arithmetic number, because the mean of its divisors is an integer number (210501160).

Almost surely, 2^421002319 is an apocalyptic number.

421002319 is a deficient number, since it is larger than the sum of its proper divisors (1).

421002319 is an equidigital number, since it uses as much as digits as its factorization.

421002319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 421002319 is about 20518.3410391776. The cubic root of 421002319 is about 749.4824987091.

The spelling of 421002319 in words is "four hundred twenty-one million, two thousand, three hundred nineteen".