68806939 has 8 divisors (see below), whose sum is σ = 74824128. Its totient is φ = 63008640.

The previous prime is 68806909. The next prime is 68806951. The reversal of 68806939 is 93960886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68806939 - 2⁷ = 68806811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68806892 and 68806901.

It is not an unprimeable number, because it can be changed into a prime (68806909) 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 7 ways as a sum of consecutive naturals, for example, 54067 + ... + 55324.

It is an arithmetic number, because the mean of its divisors is an integer number (9353016).

Almost surely, 2^68806939 is an apocalyptic number.

68806939 is a deficient number, since it is larger than the sum of its proper divisors (6017189).

68806939 is a wasteful number, since it uses less digits than its factorization.

68806939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109445.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 68806939 is about 8294.9948161527. The cubic root of 68806939 is about 409.7736982356.

The spelling of 68806939 in words is "sixty-eight million, eight hundred six thousand, nine hundred thirty-nine".