245839109 has 2 divisors, whose sum is σ = 245839110. Its totient is φ = 245839108.

The previous prime is 245839103. The next prime is 245839129. The reversal of 245839109 is 901938542.

245839109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241336225 + 4502884 = 15535^2 + 2122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245839109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245839103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122919554 + 122919555.

It is an arithmetic number, because the mean of its divisors is an integer number (122919555).

Almost surely, 2^245839109 is an apocalyptic number.

It is an amenable number.

245839109 is a deficient number, since it is larger than the sum of its proper divisors (1).

245839109 is an equidigital number, since it uses as much as digits as its factorization.

245839109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 245839109 is about 15679.2572847058. The cubic root of 245839109 is about 626.4460248526.

The spelling of 245839109 in words is "two hundred forty-five million, eight hundred thirty-nine thousand, one hundred nine".