68180971 has 4 divisors (see below), whose sum is σ = 68218632. Its totient is φ = 68143312.

The previous prime is 68180969. The next prime is 68181007. The reversal of 68180971 is 17908186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17908186 = 2 ⋅8954093.

It is a cyclic number.

It is not a de Polignac number, because 68180971 - 2¹ = 68180969 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68180951) 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 3 ways as a sum of consecutive naturals, for example, 15970 + ... + 19783.

It is an arithmetic number, because the mean of its divisors is an integer number (17054658).

Almost surely, 2^68180971 is an apocalyptic number.

68180971 is a deficient number, since it is larger than the sum of its proper divisors (37661).

68180971 is a wasteful number, since it uses less digits than its factorization.

68180971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37660.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 68180971 is about 8257.1769388817. The cubic root of 68180971 is about 408.5272782784.

The spelling of 68180971 in words is "sixty-eight million, one hundred eighty thousand, nine hundred seventy-one".