68639371 has 8 divisors (see below), whose sum is σ = 70963200. Its totient is φ = 66346560.

The previous prime is 68639369. The next prime is 68639393. The reversal of 68639371 is 17393686.

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

It is a cyclic number.

It is not a de Polignac number, because 68639371 - 2¹ = 68639369 is a prime.

It is a super-2 number, since 2×68639371² = 9422726502551282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68639471) 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, 3211 + ... + 12148.

It is an arithmetic number, because the mean of its divisors is an integer number (8870400).

Almost surely, 2^68639371 is an apocalyptic number.

68639371 is a deficient number, since it is larger than the sum of its proper divisors (2323829).

68639371 is a wasteful number, since it uses less digits than its factorization.

68639371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15509.

The product of its digits is 163296, while the sum is 43.

The square root of 68639371 is about 8284.8881102885. Note that the first 3 decimals coincide. The cubic root of 68639371 is about 409.4407823198.

The spelling of 68639371 in words is "sixty-eight million, six hundred thirty-nine thousand, three hundred seventy-one".