249171233 has 2 divisors, whose sum is σ = 249171234. Its totient is φ = 249171232.

The previous prime is 249171217. The next prime is 249171239. The reversal of 249171233 is 332171942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157452304 + 91718929 = 12548^2 + 9577^2 .

It is a cyclic number.

It is not a de Polignac number, because 249171233 - 2⁴ = 249171217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249171233.

It is not a weakly prime, because it can be changed into another prime (249171239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124585616 + 124585617.

It is an arithmetic number, because the mean of its divisors is an integer number (124585617).

Almost surely, 2^249171233 is an apocalyptic number.

It is an amenable number.

249171233 is a deficient number, since it is larger than the sum of its proper divisors (1).

249171233 is an equidigital number, since it uses as much as digits as its factorization.

249171233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 249171233 is about 15785.1586308152. The cubic root of 249171233 is about 629.2636336393.

The spelling of 249171233 in words is "two hundred forty-nine million, one hundred seventy-one thousand, two hundred thirty-three".