68911193 has 4 divisors (see below), whose sum is σ = 74212068. Its totient is φ = 63610320.

The previous prime is 68911169. The next prime is 68911207. The reversal of 68911193 is 39111986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17530969 + 51380224 = 4187^2 + 7168^2 .

It is a cyclic number.

It is not a de Polignac number, because 68911193 - 2²⁰ = 67862617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68911133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2650418 + ... + 2650443.

It is an arithmetic number, because the mean of its divisors is an integer number (18553017).

Almost surely, 2^68911193 is an apocalyptic number.

It is an amenable number.

68911193 is a deficient number, since it is larger than the sum of its proper divisors (5300875).

68911193 is a wasteful number, since it uses less digits than its factorization.

68911193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300874.

The product of its digits is 11664, while the sum is 38.

The square root of 68911193 is about 8301.2765885736. The cubic root of 68911193 is about 409.9805523197.

The spelling of 68911193 in words is "sixty-eight million, nine hundred eleven thousand, one hundred ninety-three".