68487017 has 4 divisors (see below), whose sum is σ = 68650116. Its totient is φ = 68323920.

The previous prime is 68486993. The next prime is 68487059. The reversal of 68487017 is 71078486.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12222016 + 56265001 = 3496^2 + 7501^2 .

It is a cyclic number.

It is not a de Polignac number, because 68487017 - 2⁶ = 68486953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68487817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80918 + ... + 81759.

It is an arithmetic number, because the mean of its divisors is an integer number (17162529).

Almost surely, 2^68487017 is an apocalyptic number.

It is an amenable number.

68487017 is a deficient number, since it is larger than the sum of its proper divisors (163099).

68487017 is a wasteful number, since it uses less digits than its factorization.

68487017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163098.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 68487017 is about 8275.6883097420. The cubic root of 68487017 is about 409.1376222407.

The spelling of 68487017 in words is "sixty-eight million, four hundred eighty-seven thousand, seventeen".