68147081 has 8 divisors (see below), whose sum is σ = 70362624. Its totient is φ = 65951280.

The previous prime is 68147077. The next prime is 68147089. The reversal of 68147081 is 18074186.

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 68147081 - 2² = 68147077 is a prime.

It is a super-2 number, since 2×68147081² = 9288049297641122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68147089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2246 + ... + 11888.

It is an arithmetic number, because the mean of its divisors is an integer number (8795328).

Almost surely, 2^68147081 is an apocalyptic number.

It is an amenable number.

68147081 is a deficient number, since it is larger than the sum of its proper divisors (2215543).

68147081 is a wasteful number, since it uses less digits than its factorization.

68147081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9871.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 68147081 is about 8255.1245296482. The cubic root of 68147081 is about 408.4595796042.

The spelling of 68147081 in words is "sixty-eight million, one hundred forty-seven thousand, eighty-one".