68781683 has 4 divisors (see below), whose sum is σ = 68821920. Its totient is φ = 68741448.

The previous prime is 68781673. The next prime is 68781689. The reversal of 68781683 is 38618786.

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

It is a cyclic number.

It is not a de Polignac number, because 68781683 - 2⁶ = 68781619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68781689) 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, 17435 + ... + 21012.

It is an arithmetic number, because the mean of its divisors is an integer number (17205480).

Almost surely, 2^68781683 is an apocalyptic number.

68781683 is a deficient number, since it is larger than the sum of its proper divisors (40237).

68781683 is a wasteful number, since it uses less digits than its factorization.

68781683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40236.

The product of its digits is 387072, while the sum is 47.

The square root of 68781683 is about 8293.4723126083. The cubic root of 68781683 is about 409.7235554681.

The spelling of 68781683 in words is "sixty-eight million, seven hundred eighty-one thousand, six hundred eighty-three".