68172099 has 8 divisors (see below), whose sum is σ = 90934272. Its totient is φ = 45429000.

The previous prime is 68172089. The next prime is 68172101. The reversal of 68172099 is 99027186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68172099 - 2⁸ = 68171843 is a prime.

It is a Smith number, since the sum of its digits (42) 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 68172099.

It is not an unprimeable number, because it can be changed into a prime (68172029) 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, 11862 + ... + 16644.

It is an arithmetic number, because the mean of its divisors is an integer number (11366784).

Almost surely, 2^68172099 is an apocalyptic number.

68172099 is a deficient number, since it is larger than the sum of its proper divisors (22762173).

68172099 is a wasteful number, since it uses less digits than its factorization.

68172099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9537.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 68172099 is about 8256.6396917875. The cubic root of 68172099 is about 408.5095577366.

The spelling of 68172099 in words is "sixty-eight million, one hundred seventy-two thousand, ninety-nine".