420402319 has 2 divisors, whose sum is σ = 420402320. Its totient is φ = 420402318.

The previous prime is 420402247. The next prime is 420402329. The reversal of 420402319 is 913204024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420402319 - 2¹¹ = 420400271 is a prime.

It is a super-3 number, since 3×420402319³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 420402293 and 420402302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420402329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210201159 + 210201160.

It is an arithmetic number, because the mean of its divisors is an integer number (210201160).

Almost surely, 2^420402319 is an apocalyptic number.

420402319 is a deficient number, since it is larger than the sum of its proper divisors (1).

420402319 is an equidigital number, since it uses as much as digits as its factorization.

420402319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 420402319 is about 20503.7147609890. The cubic root of 420402319 is about 749.1262827008.

The spelling of 420402319 in words is "four hundred twenty million, four hundred two thousand, three hundred nineteen".