99840259 has 2 divisors, whose sum is σ = 99840260. Its totient is φ = 99840258.

The previous prime is 99840229. The next prime is 99840283. The reversal of 99840259 is 95204899.

It is a strong prime.

It is an emirp because it is prime and its reverse (95204899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99840259 - 2¹³ = 99832067 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99840229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49920129 + 49920130.

It is an arithmetic number, because the mean of its divisors is an integer number (49920130).

Almost surely, 2^99840259 is an apocalyptic number.

99840259 is a deficient number, since it is larger than the sum of its proper divisors (1).

99840259 is an equidigital number, since it uses as much as digits as its factorization.

99840259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 99840259 is about 9992.0097578015. The cubic root of 99840259 is about 463.9116009634.

The spelling of 99840259 in words is "ninety-nine million, eight hundred forty thousand, two hundred fifty-nine".