99321197 has 2 divisors, whose sum is σ = 99321198. Its totient is φ = 99321196.

The previous prime is 99321169. The next prime is 99321217. The reversal of 99321197 is 79112399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82065481 + 17255716 = 9059^2 + 4154^2 .

It is a cyclic number.

It is not a de Polignac number, because 99321197 - 2¹⁴ = 99304813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99321097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49660598 + 49660599.

It is an arithmetic number, because the mean of its divisors is an integer number (49660599).

Almost surely, 2^99321197 is an apocalyptic number.

It is an amenable number.

99321197 is a deficient number, since it is larger than the sum of its proper divisors (1).

99321197 is an equidigital number, since it uses as much as digits as its factorization.

99321197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 41.

The square root of 99321197 is about 9966.0020569936. The cubic root of 99321197 is about 463.1062565271.

Subtracting from 99321197 its sum of digits (41), we obtain a square (99321156 = 9966²).

The spelling of 99321197 in words is "ninety-nine million, three hundred twenty-one thousand, one hundred ninety-seven".