99439243 has 2 divisors, whose sum is σ = 99439244. Its totient is φ = 99439242.

The previous prime is 99439237. The next prime is 99439267. The reversal of 99439243 is 34293499.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99439243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99439243.

It is not a weakly prime, because it can be changed into another prime (99439343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49719621 + 49719622.

It is an arithmetic number, because the mean of its divisors is an integer number (49719622).

Almost surely, 2^99439243 is an apocalyptic number.

99439243 is a deficient number, since it is larger than the sum of its proper divisors (1).

99439243 is an equidigital number, since it uses as much as digits as its factorization.

99439243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 43.

The square root of 99439243 is about 9971.9227333549. The cubic root of 99439243 is about 463.2896554356.

The spelling of 99439243 in words is "ninety-nine million, four hundred thirty-nine thousand, two hundred forty-three".