245806609 has 4 divisors (see below), whose sum is σ = 245841904. Its totient is φ = 245771316.

The previous prime is 245806607. The next prime is 245806679. The reversal of 245806609 is 906608542.

It is a happy number.

245806609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245806609 - 2¹ = 245806607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245806601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3327 + ... + 22420.

It is an arithmetic number, because the mean of its divisors is an integer number (61460476).

Almost surely, 2^245806609 is an apocalyptic number.

It is an amenable number.

245806609 is a deficient number, since it is larger than the sum of its proper divisors (35295).

245806609 is an equidigital number, since it uses as much as digits as its factorization.

245806609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35294.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 245806609 is about 15678.2208493183. The cubic root of 245806609 is about 626.4184181886.

The spelling of 245806609 in words is "two hundred forty-five million, eight hundred six thousand, six hundred nine".