68886739 has 4 divisors (see below), whose sum is σ = 68954080. Its totient is φ = 68819400.

The previous prime is 68886691. The next prime is 68886749. The reversal of 68886739 is 93768886.

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 68886739 - 2⁷ = 68886611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68886739.

It is not an unprimeable number, because it can be changed into a prime (68886749) 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, 32112 + ... + 34189.

It is an arithmetic number, because the mean of its divisors is an integer number (17238520).

Almost surely, 2^68886739 is an apocalyptic number.

68886739 is a deficient number, since it is larger than the sum of its proper divisors (67341).

68886739 is a wasteful number, since it uses less digits than its factorization.

68886739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67340.

The product of its digits is 3483648, while the sum is 55.

The square root of 68886739 is about 8299.8035518921. The cubic root of 68886739 is about 409.9320510040.

The spelling of 68886739 in words is "sixty-eight million, eight hundred eighty-six thousand, seven hundred thirty-nine".