68198305 has 32 divisors (see below), whose sum is σ = 100707840. Its totient is φ = 43269120.

The previous prime is 68198219. The next prime is 68198309. The reversal of 68198305 is 50389186.

It is a happy number.

It is not a de Polignac number, because 68198305 - 2⁹ = 68197793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68198309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35356 + ... + 37234.

It is an arithmetic number, because the mean of its divisors is an integer number (3147120).

Almost surely, 2^68198305 is an apocalyptic number.

It is an amenable number.

68198305 is a deficient number, since it is larger than the sum of its proper divisors (32509535).

68198305 is a wasteful number, since it uses less digits than its factorization.

68198305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 68198305 is about 8258.2265045226. The cubic root of 68198305 is about 408.5618960107.

The spelling of 68198305 in words is "sixty-eight million, one hundred ninety-eight thousand, three hundred five".