249911 has 2 divisors, whose sum is σ = 249912.
Its totient is φ = 249910.
The previous prime is 249881. The next prime is 249923. The reversal of 249911 is 119942.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 249911 - 210 = 248887 is a prime.
It is a Chen prime.
It is a plaindrome in base 13.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249911.
It is not a weakly prime, because it can be changed into another prime (249971) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124955 + 124956.
It is an arithmetic number, because the mean of its divisors is an integer number (124956).
2249911 is an apocalyptic number.
249911 is a deficient number, since it is larger than the sum of its proper divisors (1).
249911 is an equidigital number, since it uses as much as digits as its factorization.
249911 is an evil number, because the sum of its binary digits is even.
The product of its digits is 648, while the sum is 26.
The square root of 249911 is about 499.9109920776.
The cubic root of 249911 is about 62.9885760759.
The spelling of 249911 in words is "two hundred forty-nine thousand, nine hundred eleven".