68259893 has 4 divisors (see below), whose sum is σ = 73510668. Its totient is φ = 63009120.

The previous prime is 68259869. The next prime is 68259899. The reversal of 68259893 is 39895286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39895286 = 2 ⋅19947643.

It can be written as a sum of positive squares in 2 ways, for example, as 38031889 + 30228004 = 6167^2 + 5498^2 .

It is a cyclic number.

It is not a de Polignac number, because 68259893 - 2²⁴ = 51482677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68259899) 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, 2625368 + ... + 2625393.

It is an arithmetic number, because the mean of its divisors is an integer number (18377667).

Almost surely, 2^68259893 is an apocalyptic number.

It is an amenable number.

68259893 is a deficient number, since it is larger than the sum of its proper divisors (5250775).

68259893 is a wasteful number, since it uses less digits than its factorization.

68259893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5250774.

The product of its digits is 933120, while the sum is 50.

The square root of 68259893 is about 8261.9545508312. The cubic root of 68259893 is about 408.6848459840.

The spelling of 68259893 in words is "sixty-eight million, two hundred fifty-nine thousand, eight hundred ninety-three".