999868004593 has 2 divisors, whose sum is σ = 999868004594. Its totient is φ = 999868004592.

The previous prime is 999868004563. The next prime is 999868004621. The reversal of 999868004593 is 395400868999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 755270497969 + 244597506624 = 869063^2 + 494568^2 .

It is a cyclic number.

It is not a de Polignac number, because 999868004593 - 2¹³ = 999867996401 is a prime.

It is not a weakly prime, because it can be changed into another prime (999868004563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499934002296 + 499934002297.

It is an arithmetic number, because the mean of its divisors is an integer number (499934002297).

Almost surely, 2^999868004593 is an apocalyptic number.

It is an amenable number.

999868004593 is a deficient number, since it is larger than the sum of its proper divisors (1).

999868004593 is an equidigital number, since it uses as much as digits as its factorization.

999868004593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151165440, while the sum is 70.

The spelling of 999868004593 in words is "nine hundred ninety-nine billion, eight hundred sixty-eight million, four thousand, five hundred ninety-three".