249924109 has 2 divisors, whose sum is σ = 249924110. Its totient is φ = 249924108.

The previous prime is 249924091. The next prime is 249924113. The reversal of 249924109 is 901429942.

249924109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (249924091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126225225 + 123698884 = 11235^2 + 11122^2 .

It is a cyclic number.

It is not a de Polignac number, because 249924109 - 2⁷ = 249923981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249924149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124962054 + 124962055.

It is an arithmetic number, because the mean of its divisors is an integer number (124962055).

Almost surely, 2^249924109 is an apocalyptic number.

It is an amenable number.

249924109 is a deficient number, since it is larger than the sum of its proper divisors (1).

249924109 is an equidigital number, since it uses as much as digits as its factorization.

249924109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 249924109 is about 15808.9882345456. The cubic root of 249924109 is about 629.8967740506.

The spelling of 249924109 in words is "two hundred forty-nine million, nine hundred twenty-four thousand, one hundred nine".