68513171 has 4 divisors (see below), whose sum is σ = 68625552. Its totient is φ = 68400792.

The previous prime is 68513161. The next prime is 68513189. The reversal of 68513171 is 17131586.

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

It is a cyclic number.

It is not a de Polignac number, because 68513171 - 2²² = 64318867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68513161) 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, 55271 + ... + 56496.

It is an arithmetic number, because the mean of its divisors is an integer number (17156388).

Almost surely, 2^68513171 is an apocalyptic number.

68513171 is a deficient number, since it is larger than the sum of its proper divisors (112381).

68513171 is a wasteful number, since it uses less digits than its factorization.

68513171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112380.

The product of its digits is 5040, while the sum is 32.

The square root of 68513171 is about 8277.2683295880. The cubic root of 68513171 is about 409.1896964586.

The spelling of 68513171 in words is "sixty-eight million, five hundred thirteen thousand, one hundred seventy-one".