99911197 has 2 divisors, whose sum is σ = 99911198. Its totient is φ = 99911196.

The previous prime is 99911183. The next prime is 99911263. The reversal of 99911197 is 79111999.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97990201 + 1920996 = 9899^2 + 1386^2 .

It is a cyclic number.

It is not a de Polignac number, because 99911197 - 2⁷ = 99911069 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99911897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49955598 + 49955599.

It is an arithmetic number, because the mean of its divisors is an integer number (49955599).

Almost surely, 2^99911197 is an apocalyptic number.

It is an amenable number.

99911197 is a deficient number, since it is larger than the sum of its proper divisors (1).

99911197 is an equidigital number, since it uses as much as digits as its factorization.

99911197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45927, while the sum is 46.

The square root of 99911197 is about 9995.5588638155. The cubic root of 99911197 is about 464.0214469996.

The spelling of 99911197 in words is "ninety-nine million, nine hundred eleven thousand, one hundred ninety-seven".