245845789 has 24 divisors (see below), whose sum is σ = 313278840. Its totient is φ = 191471616.

The previous prime is 245845783. The next prime is 245845793. The reversal of 245845789 is 987548542.

It can be written as a sum of positive squares in 4 ways, for example, as 86025625 + 159820164 = 9275^2 + 12642^2 .

It is not a de Polignac number, because 245845789 - 2⁵ = 245845757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245845783) 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 23 ways as a sum of consecutive naturals, for example, 19069 + ... + 29245.

It is an arithmetic number, because the mean of its divisors is an integer number (13053285).

Almost surely, 2^245845789 is an apocalyptic number.

245845789 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

245845789 is a deficient number, since it is larger than the sum of its proper divisors (67433051).

245845789 is a wasteful number, since it uses less digits than its factorization.

245845789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10237 (or 10230 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 52.

The square root of 245845789 is about 15679.4703035530. The cubic root of 245845789 is about 626.4516987824.

The spelling of 245845789 in words is "two hundred forty-five million, eight hundred forty-five thousand, seven hundred eighty-nine".