68641131 has 32 divisors (see below), whose sum is σ = 104670720. Its totient is φ = 39688704.

The previous prime is 68641123. The next prime is 68641141. The reversal of 68641131 is 13114686.

It is not a de Polignac number, because 68641131 - 2³ = 68641123 is a prime.

It is a super-2 number, since 2×68641131² = 9423209729918322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68641141) 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 31 ways as a sum of consecutive naturals, for example, 52275 + ... + 53571.

It is an arithmetic number, because the mean of its divisors is an integer number (3270960).

Almost surely, 2^68641131 is an apocalyptic number.

68641131 is a deficient number, since it is larger than the sum of its proper divisors (36029589).

68641131 is a wasteful number, since it uses less digits than its factorization.

68641131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395.

The product of its digits is 3456, while the sum is 30.

The square root of 68641131 is about 8284.9943270952. The cubic root of 68641131 is about 409.4442818158. Note that the first 3 decimals are identical.

The spelling of 68641131 in words is "sixty-eight million, six hundred forty-one thousand, one hundred thirty-one".