91118099 has 2 divisors, whose sum is σ = 91118100. Its totient is φ = 91118098.

The previous prime is 91118009. The next prime is 91118117. The reversal of 91118099 is 99081119.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91118099 - 2⁸ = 91117843 is a prime.

It is not a weakly prime, because it can be changed into another prime (91118009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45559049 + 45559050.

It is an arithmetic number, because the mean of its divisors is an integer number (45559050).

Almost surely, 2^91118099 is an apocalyptic number.

91118099 is a deficient number, since it is larger than the sum of its proper divisors (1).

91118099 is an equidigital number, since it uses as much as digits as its factorization.

91118099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 91118099 is about 9545.5800766638. The cubic root of 91118099 is about 449.9886400424.

The spelling of 91118099 in words is "ninety-one million, one hundred eighteen thousand, ninety-nine".