245409499 has 2 divisors, whose sum is σ = 245409500. Its totient is φ = 245409498.

The previous prime is 245409487. The next prime is 245409509. The reversal of 245409499 is 994904542.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245409499 - 2⁹ = 245408987 is a prime.

It is not a weakly prime, because it can be changed into another prime (245409449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122704749 + 122704750.

It is an arithmetic number, because the mean of its divisors is an integer number (122704750).

Almost surely, 2^245409499 is an apocalyptic number.

245409499 is a deficient number, since it is larger than the sum of its proper divisors (1).

245409499 is an equidigital number, since it uses as much as digits as its factorization.

245409499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 245409499 is about 15665.5513468247. The cubic root of 245409499 is about 626.0809020436.

The spelling of 245409499 in words is "two hundred forty-five million, four hundred nine thousand, four hundred ninety-nine".