99894391 has 2 divisors, whose sum is σ = 99894392. Its totient is φ = 99894390.

The previous prime is 99894367. The next prime is 99894433. The reversal of 99894391 is 19349899.

It is a weak prime.

It is an emirp because it is prime and its reverse (19349899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99894391 - 2¹⁵ = 99861623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99894341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49947195 + 49947196.

It is an arithmetic number, because the mean of its divisors is an integer number (49947196).

Almost surely, 2^99894391 is an apocalyptic number.

99894391 is a deficient number, since it is larger than the sum of its proper divisors (1).

99894391 is an equidigital number, since it uses as much as digits as its factorization.

99894391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 52.

The square root of 99894391 is about 9994.7181551057. The cubic root of 99894391 is about 463.9954279549.

The spelling of 99894391 in words is "ninety-nine million, eight hundred ninety-four thousand, three hundred ninety-one".