68239161 has 12 divisors (see below), whose sum is σ = 98639892. Its totient is φ = 45459456.

The previous prime is 68239133. The next prime is 68239181. The reversal of 68239161 is 16193286.

It can be written as a sum of positive squares in 2 ways, for example, as 67568400 + 670761 = 8220^2 + 819^2 .

It is not a de Polignac number, because 68239161 - 2⁶ = 68239097 is a prime.

It is a super-4 number, since 4×68239161⁴ (a number of 32 digits) contains 4444 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68239111) 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 11 ways as a sum of consecutive naturals, for example, 20185 + ... + 23321.

It is an arithmetic number, because the mean of its divisors is an integer number (8219991).

Almost surely, 2^68239161 is an apocalyptic number.

It is an amenable number.

68239161 is a deficient number, since it is larger than the sum of its proper divisors (30400731).

68239161 is a wasteful number, since it uses less digits than its factorization.

68239161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5560 (or 5557 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 68239161 is about 8260.6997887588. The cubic root of 68239161 is about 408.6434663305.

The spelling of 68239161 in words is "sixty-eight million, two hundred thirty-nine thousand, one hundred sixty-one".