68517929 has 8 divisors (see below), whose sum is σ = 70616448. Its totient is φ = 66439840.

The previous prime is 68517919. The next prime is 68517931. The reversal of 68517929 is 92971586.

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 68517929 - 2⁴ = 68517913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68517919) 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, 1844 + ... + 11850.

It is an arithmetic number, because the mean of its divisors is an integer number (8827056).

Almost surely, 2^68517929 is an apocalyptic number.

It is an amenable number.

68517929 is a deficient number, since it is larger than the sum of its proper divisors (2098519).

68517929 is a wasteful number, since it uses less digits than its factorization.

68517929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10215.

The product of its digits is 272160, while the sum is 47.

The square root of 68517929 is about 8277.5557382599. Note that the first 3 decimals coincide. The cubic root of 68517929 is about 409.1991685036.

The spelling of 68517929 in words is "sixty-eight million, five hundred seventeen thousand, nine hundred twenty-nine".