999255197 has 2 divisors, whose sum is σ = 999255198. Its totient is φ = 999255196.

The previous prime is 999255193. The next prime is 999255247. The reversal of 999255197 is 791552999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 952277881 + 46977316 = 30859^2 + 6854^2 .

It is a cyclic number.

It is not a de Polignac number, because 999255197 - 2² = 999255193 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999255193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499627598 + 499627599.

It is an arithmetic number, because the mean of its divisors is an integer number (499627599).

Almost surely, 2^999255197 is an apocalyptic number.

It is an amenable number.

999255197 is a deficient number, since it is larger than the sum of its proper divisors (1).

999255197 is an equidigital number, since it uses as much as digits as its factorization.

999255197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2296350, while the sum is 56.

The square root of 999255197 is about 31610.9980386574. The cubic root of 999255197 is about 999.7516706710.

The spelling of 999255197 in words is "nine hundred ninety-nine million, two hundred fifty-five thousand, one hundred ninety-seven".