421310293 has 2 divisors, whose sum is σ = 421310294. Its totient is φ = 421310292.

The previous prime is 421310291. The next prime is 421310321. The reversal of 421310293 is 392013124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402283249 + 19027044 = 20057^2 + 4362^2 .

It is a cyclic number.

It is not a de Polignac number, because 421310293 - 2¹ = 421310291 is a prime.

Together with 421310291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421310291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210655146 + 210655147.

It is an arithmetic number, because the mean of its divisors is an integer number (210655147).

Almost surely, 2^421310293 is an apocalyptic number.

It is an amenable number.

421310293 is a deficient number, since it is larger than the sum of its proper divisors (1).

421310293 is an equidigital number, since it uses as much as digits as its factorization.

421310293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 421310293 is about 20525.8445136857. The cubic root of 421310293 is about 749.6652093907.

The spelling of 421310293 in words is "four hundred twenty-one million, three hundred ten thousand, two hundred ninety-three".