99999259 has 2 divisors, whose sum is σ = 99999260.
Its totient is φ = 99999258.
The previous prime is 99999257. The next prime is 99999307. The reversal of 99999259 is 95299999.
It is a weak prime.
It is an emirp because it is prime and its reverse (95299999) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 99999259 - 21 = 99999257 is a prime.
It is a super-3 number, since 3×999992593 (a number of 25 digits) contains 333 as substring.
Together with 99999257, it forms a pair of twin primes.
It is a junction number, because it is equal to n+sod(n) for n = 99999197 and 99999206.
It is not a weakly prime, because it can be changed into another prime (99999257) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999629 + 49999630.
It is an arithmetic number, because the mean of its divisors is an integer number (49999630).
Almost surely, 299999259 is an apocalyptic number.
99999259 is a deficient number, since it is larger than the sum of its proper divisors (1).
99999259 is an equidigital number, since it uses as much as digits as its factorization.
99999259 is an evil number, because the sum of its binary digits is even.
The product of its digits is 5314410, while the sum is 61.
The square root of 99999259 is about 9999.9629499314.
The cubic root of 99999259 is about 464.1577368860.
The spelling of 99999259 in words is "ninety-nine million, nine hundred ninety-nine thousand, two hundred fifty-nine".