245805889 has 4 divisors (see below), whose sum is σ = 280921024. Its totient is φ = 210690756.

The previous prime is 245805871. The next prime is 245805919. The reversal of 245805889 is 988508542.

245805889 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 245805889 - 2¹⁹ = 245281601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245805289) 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, 17557557 + ... + 17557570.

It is an arithmetic number, because the mean of its divisors is an integer number (70230256).

Almost surely, 2^245805889 is an apocalyptic number.

It is an amenable number.

245805889 is a deficient number, since it is larger than the sum of its proper divisors (35115135).

245805889 is an equidigital number, since it uses as much as digits as its factorization.

245805889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35115134.

The product of its (nonzero) digits is 921600, while the sum is 49.

The square root of 245805889 is about 15678.1978875125. The cubic root of 245805889 is about 626.4178065672.

The spelling of 245805889 in words is "two hundred forty-five million, eight hundred five thousand, eight hundred eighty-nine".