245791809 has 12 divisors (see below), whose sum is σ = 373718800. Its totient is φ = 155236824.

The previous prime is 245791789. The next prime is 245791829. The reversal of 245791809 is 908197542.

245791809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (245791789) and next prime (245791829).

It is not a de Polignac number, because 245791809 - 2⁹ = 245791297 is a prime.

It is a super-2 number, since 2×245791809² = 120827226742984962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245791829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 718519 + ... + 718860.

Almost surely, 2^245791809 is an apocalyptic number.

It is an amenable number.

245791809 is a deficient number, since it is larger than the sum of its proper divisors (127926991).

245791809 is a wasteful number, since it uses less digits than its factorization.

245791809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437404 (or 1437401 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 245791809 is about 15677.7488498828. The cubic root of 245791809 is about 626.4058457321.

The spelling of 245791809 in words is "two hundred forty-five million, seven hundred ninety-one thousand, eight hundred nine".