420004393 has 2 divisors, whose sum is σ = 420004394. Its totient is φ = 420004392.

The previous prime is 420004391. The next prime is 420004411. The reversal of 420004393 is 393400024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 392515344 + 27489049 = 19812^2 + 5243^2 .

It is a cyclic number.

It is not a de Polignac number, because 420004393 - 2¹ = 420004391 is a prime.

Together with 420004391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (420004391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210002196 + 210002197.

It is an arithmetic number, because the mean of its divisors is an integer number (210002197).

Almost surely, 2^420004393 is an apocalyptic number.

It is an amenable number.

420004393 is a deficient number, since it is larger than the sum of its proper divisors (1).

420004393 is an equidigital number, since it uses as much as digits as its factorization.

420004393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 420004393 is about 20494.0087098645. The cubic root of 420004393 is about 748.8898497140.

The spelling of 420004393 in words is "four hundred twenty million, four thousand, three hundred ninety-three".