68506253 has 4 divisors (see below), whose sum is σ = 68576928. Its totient is φ = 68435580.

The previous prime is 68506247. The next prime is 68506261. The reversal of 68506253 is 35260586.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35260586 = 2 ⋅17630293.

It is a cyclic number.

It is not a de Polignac number, because 68506253 - 2⁶ = 68506189 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 (68506283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33863 + ... + 35828.

It is an arithmetic number, because the mean of its divisors is an integer number (17144232).

Almost surely, 2^68506253 is an apocalyptic number.

It is an amenable number.

68506253 is a deficient number, since it is larger than the sum of its proper divisors (70675).

68506253 is an equidigital number, since it uses as much as digits as its factorization.

68506253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70674.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 68506253 is about 8276.8504275479. The cubic root of 68506253 is about 409.1759235857.

The spelling of 68506253 in words is "sixty-eight million, five hundred six thousand, two hundred fifty-three".