68381853 has 4 divisors (see below), whose sum is σ = 91175808. Its totient is φ = 45587900.

The previous prime is 68381843. The next prime is 68381857. The reversal of 68381853 is 35818386.

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.

It is a cyclic number.

It is not a de Polignac number, because 68381853 - 2¹⁴ = 68365469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68381857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11396973 + ... + 11396978.

It is an arithmetic number, because the mean of its divisors is an integer number (22793952).

Almost surely, 2^68381853 is an apocalyptic number.

It is an amenable number.

68381853 is a deficient number, since it is larger than the sum of its proper divisors (22793955).

68381853 is a wasteful number, since it uses less digits than its factorization.

68381853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22793954.

The product of its digits is 138240, while the sum is 42.

The square root of 68381853 is about 8269.3320770181. The cubic root of 68381853 is about 408.9281003368.

The spelling of 68381853 in words is "sixty-eight million, three hundred eighty-one thousand, eight hundred fifty-three".