805564393 has 2 divisors, whose sum is σ = 805564394. Its totient is φ = 805564392.

The previous prime is 805564387. The next prime is 805564399. The reversal of 805564393 is 393465508.

It is a balanced prime because it is at equal distance from previous prime (805564387) and next prime (805564399).

It can be written as a sum of positive squares in only one way, i.e., 550747024 + 254817369 = 23468^2 + 15963^2 .

It is a cyclic number.

It is not a de Polignac number, because 805564393 - 2²¹ = 803467241 is a prime.

It is not a weakly prime, because it can be changed into another prime (805564399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402782196 + 402782197.

It is an arithmetic number, because the mean of its divisors is an integer number (402782197).

Almost surely, 2^805564393 is an apocalyptic number.

It is an amenable number.

805564393 is a deficient number, since it is larger than the sum of its proper divisors (1).

805564393 is an equidigital number, since it uses as much as digits as its factorization.

805564393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 805564393 is about 28382.4662952323. The cubic root of 805564393 is about 930.4650978447.

The spelling of 805564393 in words is "eight hundred five million, five hundred sixty-four thousand, three hundred ninety-three".