68781193 has 8 divisors (see below), whose sum is σ = 74140808. Its totient is φ = 63431424.

The previous prime is 68781173. The next prime is 68781199. The reversal of 68781193 is 39118786.

It can be written as a sum of positive squares in 4 ways, for example, as 5626384 + 63154809 = 2372^2 + 7947^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68781193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68781199) 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, 19105 + ... + 22417.

It is an arithmetic number, because the mean of its divisors is an integer number (9267601).

Almost surely, 2^68781193 is an apocalyptic number.

It is an amenable number.

68781193 is a deficient number, since it is larger than the sum of its proper divisors (5359615).

68781193 is a wasteful number, since it uses less digits than its factorization.

68781193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923.

The product of its digits is 72576, while the sum is 43.

The square root of 68781193 is about 8293.4427712501. The cubic root of 68781193 is about 409.7225825104.

The spelling of 68781193 in words is "sixty-eight million, seven hundred eighty-one thousand, one hundred ninety-three".