245869439 has 2 divisors, whose sum is σ = 245869440. Its totient is φ = 245869438.

The previous prime is 245869433. The next prime is 245869469. The reversal of 245869439 is 934968542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245869439 - 2¹² = 245865343 is a prime.

It is a Sophie Germain 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 (245869433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122934719 + 122934720.

It is an arithmetic number, because the mean of its divisors is an integer number (122934720).

Almost surely, 2^245869439 is an apocalyptic number.

245869439 is a deficient number, since it is larger than the sum of its proper divisors (1).

245869439 is an equidigital number, since it uses as much as digits as its factorization.

245869439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 50.

The square root of 245869439 is about 15680.2244563016. The cubic root of 245869439 is about 626.4717860461.

The spelling of 245869439 in words is "two hundred forty-five million, eight hundred sixty-nine thousand, four hundred thirty-nine".