985019197 has 2 divisors, whose sum is σ = 985019198. Its totient is φ = 985019196.

The previous prime is 985019153. The next prime is 985019201. The reversal of 985019197 is 791910589.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578835481 + 406183716 = 24059^2 + 20154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985019197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 985019197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985010197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492509598 + 492509599.

It is an arithmetic number, because the mean of its divisors is an integer number (492509599).

Almost surely, 2^985019197 is an apocalyptic number.

It is an amenable number.

985019197 is a deficient number, since it is larger than the sum of its proper divisors (1).

985019197 is an equidigital number, since it uses as much as digits as its factorization.

985019197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 49.

The square root of 985019197 is about 31385.0154851005. The cubic root of 985019197 is about 994.9812533188.

The spelling of 985019197 in words is "nine hundred eighty-five million, nineteen thousand, one hundred ninety-seven".