99705239 has 2 divisors, whose sum is σ = 99705240. Its totient is φ = 99705238.

The previous prime is 99705223. The next prime is 99705257. The reversal of 99705239 is 93250799.

It is a weak prime.

It is an emirp because it is prime and its reverse (93250799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99705239 - 2⁴ = 99705223 is a prime.

It is a super-2 number, since 2×99705239² = 19882269368094242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99705239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99705209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49852619 + 49852620.

It is an arithmetic number, because the mean of its divisors is an integer number (49852620).

Almost surely, 2^99705239 is an apocalyptic number.

99705239 is a deficient number, since it is larger than the sum of its proper divisors (1).

99705239 is an equidigital number, since it uses as much as digits as its factorization.

99705239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153090, while the sum is 44.

The square root of 99705239 is about 9985.2510734583. The cubic root of 99705239 is about 463.7023814151.

The spelling of 99705239 in words is "ninety-nine million, seven hundred five thousand, two hundred thirty-nine".