68933909 has 8 divisors (see below), whose sum is σ = 75267360. Its totient is φ = 62611600.

The previous prime is 68933873. The next prime is 68933933. The reversal of 68933909 is 90933986.

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 68933909 - 2²⁴ = 52156693 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 (68933009) 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, 15287 + ... + 19275.

It is an arithmetic number, because the mean of its divisors is an integer number (9408420).

Almost surely, 2^68933909 is an apocalyptic number.

It is an amenable number.

68933909 is a deficient number, since it is larger than the sum of its proper divisors (6333451).

68933909 is a wasteful number, since it uses less digits than its factorization.

68933909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 68933909 is about 8302.6446991305. The cubic root of 68933909 is about 410.0255962604.

The spelling of 68933909 in words is "sixty-eight million, nine hundred thirty-three thousand, nine hundred nine".