68198013 has 24 divisors (see below), whose sum is σ = 110702592. Its totient is φ = 40141728.

The previous prime is 68198003. The next prime is 68198017. The reversal of 68198013 is 31089186.

It is not a de Polignac number, because 68198013 - 2⁵ = 68197981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68198017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9981 + ... + 15362.

It is an arithmetic number, because the mean of its divisors is an integer number (4612608).

Almost surely, 2^68198013 is an apocalyptic number.

It is an amenable number.

68198013 is a deficient number, since it is larger than the sum of its proper divisors (42504579).

68198013 is a wasteful number, since it uses less digits than its factorization.

68198013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25385 (or 25382 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 68198013 is about 8258.2088251630. The cubic root of 68198013 is about 408.5613129061.

The spelling of 68198013 in words is "sixty-eight million, one hundred ninety-eight thousand, thirteen".