68939287219 has 4 divisors (see below), whose sum is σ = 75206495160. Its totient is φ = 62672079280.

The previous prime is 68939287217. The next prime is 68939287283. The reversal of 68939287219 is 91278293986.

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

It is a cyclic number.

It is not a de Polignac number, because 68939287219 - 2¹ = 68939287217 is a prime.

It is a super-2 number, since 2×68939287219² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68939287217) 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, 3133603954 + ... + 3133603975.

It is an arithmetic number, because the mean of its divisors is an integer number (18801623790).

Almost surely, 2^68939287219 is an apocalyptic number.

68939287219 is a deficient number, since it is larger than the sum of its proper divisors (6267207941).

68939287219 is a wasteful number, since it uses less digits than its factorization.

68939287219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6267207940.

The product of its digits is 23514624, while the sum is 64.

The spelling of 68939287219 in words is "sixty-eight billion, nine hundred thirty-nine million, two hundred eighty-seven thousand, two hundred nineteen".