68218207 has 4 divisors (see below), whose sum is σ = 71184240. Its totient is φ = 65252176.

The previous prime is 68218187. The next prime is 68218211. The reversal of 68218207 is 70281286.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68218207 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 (68218277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1482982 + ... + 1483027.

It is an arithmetic number, because the mean of its divisors is an integer number (17796060).

Almost surely, 2^68218207 is an apocalyptic number.

68218207 is a deficient number, since it is larger than the sum of its proper divisors (2966033).

68218207 is a wasteful number, since it uses less digits than its factorization.

68218207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2966032.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 68218207 is about 8259.4313968941. The cubic root of 68218207 is about 408.6016350630.

The spelling of 68218207 in words is "sixty-eight million, two hundred eighteen thousand, two hundred seven".