245689853 has 4 divisors (see below), whose sum is σ = 245836668. Its totient is φ = 245543040.

The previous prime is 245689819. The next prime is 245689889. The reversal of 245689853 is 358986542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 358986542 = 2 ⋅179493271.

It can be written as a sum of positive squares in 2 ways, for example, as 56957209 + 188732644 = 7547^2 + 13738^2 .

It is a cyclic number.

It is not a de Polignac number, because 245689853 - 2⁶ = 245689789 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 (245689813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70868 + ... + 74253.

It is an arithmetic number, because the mean of its divisors is an integer number (61459167).

Almost surely, 2^245689853 is an apocalyptic number.

It is an amenable number.

245689853 is a deficient number, since it is larger than the sum of its proper divisors (146815).

245689853 is a wasteful number, since it uses less digits than its factorization.

245689853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146814.

The product of its digits is 2073600, while the sum is 50.

The square root of 245689853 is about 15674.4968978274. The cubic root of 245689853 is about 626.3192213821.

The spelling of 245689853 in words is "two hundred forty-five million, six hundred eighty-nine thousand, eight hundred fifty-three".