68913971 has 16 divisors (see below), whose sum is σ = 84544704. Its totient is φ = 54825984.

The previous prime is 68913881. The next prime is 68913973. The reversal of 68913971 is 17931986.

It is a cyclic number.

It is not a de Polignac number, because 68913971 - 2¹⁸ = 68651827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68913973) 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 15 ways as a sum of consecutive naturals, for example, 4721 + ... + 12653.

It is an arithmetic number, because the mean of its divisors is an integer number (5284044).

Almost surely, 2^68913971 is an apocalyptic number.

68913971 is a deficient number, since it is larger than the sum of its proper divisors (15630733).

68913971 is a wasteful number, since it uses less digits than its factorization.

68913971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8030.

The product of its digits is 81648, while the sum is 44.

The square root of 68913971 is about 8301.4439105495. The cubic root of 68913971 is about 409.9860613941.

The spelling of 68913971 in words is "sixty-eight million, nine hundred thirteen thousand, nine hundred seventy-one".