245889809 has 8 divisors (see below), whose sum is σ = 268435200. Its totient is φ = 223376400.

The previous prime is 245889797. The next prime is 245889857. The reversal of 245889809 is 908988542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245889809 - 2¹² = 245885713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245889899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9824 + ... + 24254.

It is an arithmetic number, because the mean of its divisors is an integer number (33554400).

Almost surely, 2^245889809 is an apocalyptic number.

It is an amenable number.

245889809 is a deficient number, since it is larger than the sum of its proper divisors (22545391).

245889809 is a wasteful number, since it uses less digits than its factorization.

245889809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15991.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The square root of 245889809 is about 15680.8739871220. The cubic root of 245889809 is about 626.4890863905.

The spelling of 245889809 in words is "two hundred forty-five million, eight hundred eighty-nine thousand, eight hundred nine".