245645899 has 2 divisors, whose sum is σ = 245645900. Its totient is φ = 245645898.

The previous prime is 245645893. The next prime is 245645909. The reversal of 245645899 is 998546542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245645899 - 2⁵ = 245645867 is a prime.

It is not a weakly prime, because it can be changed into another prime (245645893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122822949 + 122822950.

It is an arithmetic number, because the mean of its divisors is an integer number (122822950).

Almost surely, 2^245645899 is an apocalyptic number.

245645899 is a deficient number, since it is larger than the sum of its proper divisors (1).

245645899 is an equidigital number, since it uses as much as digits as its factorization.

245645899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3110400, while the sum is 52.

The square root of 245645899 is about 15673.0947486449. The cubic root of 245645899 is about 626.2818695792.

The spelling of 245645899 in words is "two hundred forty-five million, six hundred forty-five thousand, eight hundred ninety-nine".