68638893 has 8 divisors (see below), whose sum is σ = 92425056. Its totient is φ = 45306000.

The previous prime is 68638873. The next prime is 68638903. The reversal of 68638893 is 39883686.

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

It is not a de Polignac number, because 68638893 - 2⁸ = 68638637 is a prime.

It is a super-2 number, since 2×68638893² = 9422595264530898, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68638813) 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 7 ways as a sum of consecutive naturals, for example, 112963 + ... + 113568.

It is an arithmetic number, because the mean of its divisors is an integer number (11553132).

Almost surely, 2^68638893 is an apocalyptic number.

It is an amenable number.

68638893 is a deficient number, since it is larger than the sum of its proper divisors (23786163).

68638893 is a wasteful number, since it uses less digits than its factorization.

68638893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226635.

The product of its digits is 1492992, while the sum is 51.

The square root of 68638893 is about 8284.8592625343. The cubic root of 68638893 is about 409.4398318781.

The spelling of 68638893 in words is "sixty-eight million, six hundred thirty-eight thousand, eight hundred ninety-three".