249344609 has 2 divisors, whose sum is σ = 249344610. Its totient is φ = 249344608.

The previous prime is 249344569. The next prime is 249344629. The reversal of 249344609 is 906443942.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214534609 + 34810000 = 14647^2 + 5900^2 .

It is a cyclic number.

It is not a de Polignac number, because 249344609 - 2²⁴ = 232567393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (249344629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124672304 + 124672305.

It is an arithmetic number, because the mean of its divisors is an integer number (124672305).

Almost surely, 2^249344609 is an apocalyptic number.

It is an amenable number.

249344609 is a deficient number, since it is larger than the sum of its proper divisors (1).

249344609 is an equidigital number, since it uses as much as digits as its factorization.

249344609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 249344609 is about 15790.6494166643. The cubic root of 249344609 is about 629.4095492494.

The spelling of 249344609 in words is "two hundred forty-nine million, three hundred forty-four thousand, six hundred nine".