421229293 has 2 divisors, whose sum is σ = 421229294. Its totient is φ = 421229292.

The previous prime is 421229269. The next prime is 421229323. The reversal of 421229293 is 392922124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226291849 + 194937444 = 15043^2 + 13962^2 .

It is a cyclic number.

It is not a de Polignac number, because 421229293 - 2⁹ = 421228781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421229093) 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, 210614646 + 210614647.

It is an arithmetic number, because the mean of its divisors is an integer number (210614647).

Almost surely, 2^421229293 is an apocalyptic number.

It is an amenable number.

421229293 is a deficient number, since it is larger than the sum of its proper divisors (1).

421229293 is an equidigital number, since it uses as much as digits as its factorization.

421229293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 421229293 is about 20523.8712966146. The cubic root of 421229293 is about 749.6171634296.

It can be divided in two parts, 42122 and 9293, that added together give a palindrome (51415).

The spelling of 421229293 in words is "four hundred twenty-one million, two hundred twenty-nine thousand, two hundred ninety-three".