99995257 has 2 divisors, whose sum is σ = 99995258.
Its totient is φ = 99995256.
The previous prime is 99995249. The next prime is 99995261. The reversal of 99995257 is 75259999.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 97990201 + 2005056 = 9899^2 + 1416^2
It is an emirp because it is prime and its reverse (75259999) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 99995257 - 23 = 99995249 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 99995198 and 99995207.
It is not a weakly prime, because it can be changed into another prime (99995227) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49997628 + 49997629.
It is an arithmetic number, because the mean of its divisors is an integer number (49997629).
Almost surely, 299995257 is an apocalyptic number.
It is an amenable number.
99995257 is a deficient number, since it is larger than the sum of its proper divisors (1).
99995257 is an equidigital number, since it uses as much as digits as its factorization.
99995257 is an evil number, because the sum of its binary digits is even.
The product of its digits is 2296350, while the sum is 55.
The square root of 99995257 is about 9999.7628471879.
The cubic root of 99995257 is about 464.1515448933.
The spelling of 99995257 in words is "ninety-nine million, nine hundred ninety-five thousand, two hundred fifty-seven".