245478893 has 4 divisors (see below), whose sum is σ = 267795168. Its totient is φ = 223162620.

The previous prime is 245478859. The next prime is 245478901. The reversal of 245478893 is 398874542.

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 245478893 - 2⁶ = 245478829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245478293) 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 3 ways as a sum of consecutive naturals, for example, 11158121 + ... + 11158142.

It is an arithmetic number, because the mean of its divisors is an integer number (66948792).

Almost surely, 2^245478893 is an apocalyptic number.

It is an amenable number.

245478893 is a deficient number, since it is larger than the sum of its proper divisors (22316275).

245478893 is a wasteful number, since it uses less digits than its factorization.

245478893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22316274.

The product of its digits is 1935360, while the sum is 50.

The square root of 245478893 is about 15667.7660500787. The cubic root of 245478893 is about 626.1399084035.

The spelling of 245478893 in words is "two hundred forty-five million, four hundred seventy-eight thousand, eight hundred ninety-three".