99618089 has 2 divisors, whose sum is σ = 99618090. Its totient is φ = 99618088.

The previous prime is 99618067. The next prime is 99618107. The reversal of 99618089 is 98081699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99600400 + 17689 = 9980^2 + 133^2 .

It is a cyclic number.

It is not a de Polignac number, because 99618089 - 2¹² = 99613993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99618049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49809044 + 49809045.

It is an arithmetic number, because the mean of its divisors is an integer number (49809045).

Almost surely, 2^99618089 is an apocalyptic number.

It is an amenable number.

99618089 is a deficient number, since it is larger than the sum of its proper divisors (1).

99618089 is an equidigital number, since it uses as much as digits as its factorization.

99618089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 99618089 is about 9980.8861831002. The cubic root of 99618089 is about 463.5672382572.

The spelling of 99618089 in words is "ninety-nine million, six hundred eighteen thousand, eighty-nine".