993746197 has 2 divisors, whose sum is σ = 993746198. Its totient is φ = 993746196.

The previous prime is 993746191. The next prime is 993746213. The reversal of 993746197 is 791647399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 991872036 + 1874161 = 31494^2 + 1369^2 .

It is an emirp because it is prime and its reverse (791647399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 993746197 - 2¹¹ = 993744149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993746191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496873098 + 496873099.

It is an arithmetic number, because the mean of its divisors is an integer number (496873099).

Almost surely, 2^993746197 is an apocalyptic number.

It is an amenable number.

993746197 is a deficient number, since it is larger than the sum of its proper divisors (1).

993746197 is an equidigital number, since it uses as much as digits as its factorization.

993746197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2571912, while the sum is 55.

The square root of 993746197 is about 31523.7402127349. The cubic root of 993746197 is about 997.9110382775.

The spelling of 993746197 in words is "nine hundred ninety-three million, seven hundred forty-six thousand, one hundred ninety-seven".