68993121 has 16 divisors (see below), whose sum is σ = 94011840. Its totient is φ = 44990400.

The previous prime is 68993107. The next prime is 68993129. The reversal of 68993121 is 12139986.

It is not a de Polignac number, because 68993121 - 2¹¹ = 68991073 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68993121.

It is not an unprimeable number, because it can be changed into a prime (68993129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98071 + ... + 98771.

It is an arithmetic number, because the mean of its divisors is an integer number (5875740).

Almost surely, 2^68993121 is an apocalyptic number.

It is an amenable number.

68993121 is a deficient number, since it is larger than the sum of its proper divisors (25018719).

68993121 is a wasteful number, since it uses less digits than its factorization.

68993121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376.

The product of its digits is 23328, while the sum is 39.

The square root of 68993121 is about 8306.2097854557. The cubic root of 68993121 is about 410.1429622409.

The spelling of 68993121 in words is "sixty-eight million, nine hundred ninety-three thousand, one hundred twenty-one".