245765393 has 4 divisors (see below), whose sum is σ = 245840100. Its totient is φ = 245690688.

The previous prime is 245765381. The next prime is 245765417. The reversal of 245765393 is 393567542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393567542 = 2 ⋅196783771.

It can be written as a sum of positive squares in 2 ways, for example, as 80694289 + 165071104 = 8983^2 + 12848^2 .

It is a cyclic number.

It is not a de Polignac number, because 245765393 - 2⁶ = 245765329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245765353) 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, 32180 + ... + 39077.

It is an arithmetic number, because the mean of its divisors is an integer number (61460025).

Almost surely, 2^245765393 is an apocalyptic number.

It is an amenable number.

245765393 is a deficient number, since it is larger than the sum of its proper divisors (74707).

245765393 is an equidigital number, since it uses as much as digits as its factorization.

245765393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74706.

The product of its digits is 680400, while the sum is 44.

The square root of 245765393 is about 15676.9063593555. The cubic root of 245765393 is about 626.3834043420.

The spelling of 245765393 in words is "two hundred forty-five million, seven hundred sixty-five thousand, three hundred ninety-three".