249169009 has 2 divisors, whose sum is σ = 249169010. Its totient is φ = 249169008.

The previous prime is 249168991. The next prime is 249169027. The reversal of 249169009 is 900961942.

It is a balanced prime because it is at equal distance from previous prime (249168991) and next prime (249169027).

It can be written as a sum of positive squares in only one way, i.e., 221920609 + 27248400 = 14897^2 + 5220^2 .

It is a cyclic number.

It is not a de Polignac number, because 249169009 - 2¹¹ = 249166961 is a prime.

It is not a weakly prime, because it can be changed into another prime (249169099) 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, 124584504 + 124584505.

It is an arithmetic number, because the mean of its divisors is an integer number (124584505).

Almost surely, 2^249169009 is an apocalyptic number.

It is an amenable number.

249169009 is a deficient number, since it is larger than the sum of its proper divisors (1).

249169009 is an equidigital number, since it uses as much as digits as its factorization.

249169009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 249169009 is about 15785.0881847394. The cubic root of 249169009 is about 629.2617614509.

The spelling of 249169009 in words is "two hundred forty-nine million, one hundred sixty-nine thousand, nine".