68679809 has 8 divisors (see below), whose sum is σ = 75116928. Its totient is φ = 62274960.

The previous prime is 68679803. The next prime is 68679829. The reversal of 68679809 is 90897686.

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

It is not a de Polignac number, because 68679809 - 2¹² = 68675713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68679803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3497 + ... + 12230.

It is an arithmetic number, because the mean of its divisors is an integer number (9389616).

Almost surely, 2^68679809 is an apocalyptic number.

It is an amenable number.

68679809 is a deficient number, since it is larger than the sum of its proper divisors (6437119).

68679809 is a wasteful number, since it uses less digits than its factorization.

68679809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16135.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 68679809 is about 8287.3282184308. The cubic root of 68679809 is about 409.5211721200.

The spelling of 68679809 in words is "sixty-eight million, six hundred seventy-nine thousand, eight hundred nine".