68780217 has 8 divisors (see below), whose sum is σ = 100044000. Its totient is φ = 41684960.

The previous prime is 68780183. The next prime is 68780219. The reversal of 68780217 is 71208786.

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 68780217 - 2⁸ = 68779961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68780219) 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, 1042092 + ... + 1042157.

It is an arithmetic number, because the mean of its divisors is an integer number (12505500).

Almost surely, 2^68780217 is an apocalyptic number.

It is an amenable number.

68780217 is a deficient number, since it is larger than the sum of its proper divisors (31263783).

68780217 is a wasteful number, since it uses less digits than its factorization.

68780217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084263.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 68780217 is about 8293.3839293741. The cubic root of 68780217 is about 409.7206445236.

The spelling of 68780217 in words is "sixty-eight million, seven hundred eighty thousand, two hundred seventeen".