68051971 has 4 divisors (see below), whose sum is σ = 73286752. Its totient is φ = 62817192.

The previous prime is 68051959. The next prime is 68051989. The reversal of 68051971 is 17915086.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68051971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68051971.

It is not an unprimeable number, because it can be changed into a prime (68051171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2617371 + ... + 2617396.

It is an arithmetic number, because the mean of its divisors is an integer number (18321688).

Almost surely, 2^68051971 is an apocalyptic number.

68051971 is a deficient number, since it is larger than the sum of its proper divisors (5234781).

68051971 is a wasteful number, since it uses less digits than its factorization.

68051971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5234780.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 68051971 is about 8249.3618541073. The cubic root of 68051971 is about 408.2694678773.

The spelling of 68051971 in words is "sixty-eight million, fifty-one thousand, nine hundred seventy-one".