999255193 has 2 divisors, whose sum is σ = 999255194. Its totient is φ = 999255192.

The previous prime is 999255151. The next prime is 999255197. The reversal of 999255193 is 391552999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 985771609 + 13483584 = 31397^2 + 3672^2 .

It is an emirp because it is prime and its reverse (391552999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999255193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999255193.

It is not a weakly prime, because it can be changed into another prime (999255197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499627596 + 499627597.

It is an arithmetic number, because the mean of its divisors is an integer number (499627597).

Almost surely, 2^999255193 is an apocalyptic number.

It is an amenable number.

999255193 is a deficient number, since it is larger than the sum of its proper divisors (1).

999255193 is an equidigital number, since it uses as much as digits as its factorization.

999255193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 984150, while the sum is 52.

The square root of 999255193 is about 31610.9979753882. The cubic root of 999255193 is about 999.7516693370.

The spelling of 999255193 in words is "nine hundred ninety-nine million, two hundred fifty-five thousand, one hundred ninety-three".