68138061 has 8 divisors (see below), whose sum is σ = 92130624. Its totient is φ = 44785440.

The previous prime is 68138051. The next prime is 68138087. The reversal of 68138061 is 16083186.

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

It is not a de Polignac number, because 68138061 - 2¹³ = 68129869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68138011) 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, 159736 + ... + 160161.

It is an arithmetic number, because the mean of its divisors is an integer number (11516328).

Almost surely, 2^68138061 is an apocalyptic number.

It is an amenable number.

68138061 is a deficient number, since it is larger than the sum of its proper divisors (23992563).

68138061 is a wasteful number, since it uses less digits than its factorization.

68138061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319971.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 68138061 is about 8254.5781842563. The cubic root of 68138061 is about 408.4415574678.

The spelling of 68138061 in words is "sixty-eight million, one hundred thirty-eight thousand, sixty-one".