919328197 has 2 divisors, whose sum is σ = 919328198. Its totient is φ = 919328196.

The previous prime is 919328183. The next prime is 919328209. The reversal of 919328197 is 791823919.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 919241761 + 86436 = 30319^2 + 294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-919328197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 919328197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (919328177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459664098 + 459664099.

It is an arithmetic number, because the mean of its divisors is an integer number (459664099).

Almost surely, 2^919328197 is an apocalyptic number.

It is an amenable number.

919328197 is a deficient number, since it is larger than the sum of its proper divisors (1).

919328197 is an equidigital number, since it uses as much as digits as its factorization.

919328197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 49.

The square root of 919328197 is about 30320.4254092847. The cubic root of 919328197 is about 972.3520337569.

The spelling of 919328197 in words is "nine hundred nineteen million, three hundred twenty-eight thousand, one hundred ninety-seven".