68199198 has 16 divisors (see below), whose sum is σ = 137012736. Its totient is φ = 22630680.

The previous prime is 68199193. The next prime is 68199211. The reversal of 68199198 is 89199186.

It is a happy number.

It is a super-2 number, since 2×68199198² = 9302261215686408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68199198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68199193) 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, 24148 + ... + 26823.

It is an arithmetic number, because the mean of its divisors is an integer number (8563296).

Almost surely, 2^68199198 is an apocalyptic number.

68199198 is an abundant number, since it is smaller than the sum of its proper divisors (68813538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68199198 is a wasteful number, since it uses less digits than its factorization.

68199198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51199.

The product of its digits is 279936, while the sum is 51.

The square root of 68199198 is about 8258.2805716444. The cubic root of 68199198 is about 408.5636792622.

The spelling of 68199198 in words is "sixty-eight million, one hundred ninety-nine thousand, one hundred ninety-eight".