905020393 has 2 divisors, whose sum is σ = 905020394. Its totient is φ = 905020392.

The previous prime is 905020373. The next prime is 905020433. The reversal of 905020393 is 393020509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 805878544 + 99141849 = 28388^2 + 9957^2 .

It is a cyclic number.

It is not a de Polignac number, because 905020393 - 2⁹ = 905019881 is a prime.

It is not a weakly prime, because it can be changed into another prime (905020373) 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, 452510196 + 452510197.

It is an arithmetic number, because the mean of its divisors is an integer number (452510197).

Almost surely, 2^905020393 is an apocalyptic number.

It is an amenable number.

905020393 is a deficient number, since it is larger than the sum of its proper divisors (1).

905020393 is an equidigital number, since it uses as much as digits as its factorization.

905020393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 905020393 is about 30083.5568542019. The cubic root of 905020393 is about 967.2812924527.

The spelling of 905020393 in words is "nine hundred five million, twenty thousand, three hundred ninety-three".