68385253 has 4 divisors (see below), whose sum is σ = 70053228. Its totient is φ = 66717280.

The previous prime is 68385241. The next prime is 68385257. The reversal of 68385253 is 35258386.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4656964 + 63728289 = 2158^2 + 7983^2 .

It is a cyclic number.

It is not a de Polignac number, because 68385253 - 2⁵ = 68385221 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68385257) 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, 833926 + ... + 834007.

It is an arithmetic number, because the mean of its divisors is an integer number (17513307).

Almost surely, 2^68385253 is an apocalyptic number.

It is an amenable number.

68385253 is a deficient number, since it is larger than the sum of its proper divisors (1667975).

68385253 is a wasteful number, since it uses less digits than its factorization.

68385253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667974.

The product of its digits is 172800, while the sum is 40.

The square root of 68385253 is about 8269.5376533395. The cubic root of 68385253 is about 408.9348776344.

The spelling of 68385253 in words is "sixty-eight million, three hundred eighty-five thousand, two hundred fifty-three".