245323204309 has 4 divisors (see below), whose sum is σ = 245342596320. Its totient is φ = 245303812300.

The previous prime is 245323204307. The next prime is 245323204319. The reversal of 245323204309 is 903402323542.

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 245323204309 - 2¹ = 245323204307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245323204307) 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, 9677017 + ... + 9702334.

It is an arithmetic number, because the mean of its divisors is an integer number (61335649080).

Almost surely, 2^245323204309 is an apocalyptic number.

It is an amenable number.

245323204309 is a deficient number, since it is larger than the sum of its proper divisors (19392011).

245323204309 is a wasteful number, since it uses less digits than its factorization.

245323204309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19392010.

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 245323204309 in words is "two hundred forty-five billion, three hundred twenty-three million, two hundred four thousand, three hundred nine".