913784197 has 2 divisors, whose sum is σ = 913784198. Its totient is φ = 913784196.

The previous prime is 913784191. The next prime is 913784213. The reversal of 913784197 is 791487319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 909565281 + 4218916 = 30159^2 + 2054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-913784197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 913784197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (913784191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456892098 + 456892099.

It is an arithmetic number, because the mean of its divisors is an integer number (456892099).

Almost surely, 2^913784197 is an apocalyptic number.

It is an amenable number.

913784197 is a deficient number, since it is larger than the sum of its proper divisors (1).

913784197 is an equidigital number, since it uses as much as digits as its factorization.

913784197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 49.

The square root of 913784197 is about 30228.8636405671. The cubic root of 913784197 is about 970.3935049197.

The spelling of 913784197 in words is "nine hundred thirteen million, seven hundred eighty-four thousand, one hundred ninety-seven".