245800609 has 4 divisors (see below), whose sum is σ = 256487616. Its totient is φ = 235113604.

The previous prime is 245800571. The next prime is 245800627. The reversal of 245800609 is 906008542.

It is a happy number.

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 245800609 - 2⁷ = 245800481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245800109) 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, 5343469 + ... + 5343514.

It is an arithmetic number, because the mean of its divisors is an integer number (64121904).

Almost surely, 2^245800609 is an apocalyptic number.

It is an amenable number.

245800609 is a deficient number, since it is larger than the sum of its proper divisors (10687007).

245800609 is a wasteful number, since it uses less digits than its factorization.

245800609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10687006.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 245800609 is about 15678.0294999085. The cubic root of 245800609 is about 626.4133213076.

The spelling of 245800609 in words is "two hundred forty-five million, eight hundred thousand, six hundred nine".