68512198 has 4 divisors (see below), whose sum is σ = 102768300. Its totient is φ = 34256098.

The previous prime is 68512187. The next prime is 68512243. The reversal of 68512198 is 89121586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89121586 = 2 ⋅44560793.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 68512198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17128048 + ... + 17128051.

It is an arithmetic number, because the mean of its divisors is an integer number (25692075).

Almost surely, 2^68512198 is an apocalyptic number.

68512198 is a deficient number, since it is larger than the sum of its proper divisors (34256102).

68512198 is a wasteful number, since it uses less digits than its factorization.

68512198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34256101.

The product of its digits is 34560, while the sum is 40.

The square root of 68512198 is about 8277.2095539499. The cubic root of 68512198 is about 409.1877593933.

The spelling of 68512198 in words is "sixty-eight million, five hundred twelve thousand, one hundred ninety-eight".