68871217 has 4 divisors (see below), whose sum is σ = 68916736. Its totient is φ = 68825700.

The previous prime is 68871197. The next prime is 68871241. The reversal of 68871217 is 71217886.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71217886 = 2 ⋅35608943.

It is a cyclic number.

It is not a de Polignac number, because 68871217 - 2¹¹ = 68869169 is a prime.

It is a super-2 number, since 2×68871217² = 9486489062122178, which contains 22 as substring.

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 68871217.

It is not an unprimeable number, because it can be changed into a prime (68871287) 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, 20409 + ... + 23542.

It is an arithmetic number, because the mean of its divisors is an integer number (17229184).

Almost surely, 2^68871217 is an apocalyptic number.

It is an amenable number.

68871217 is a deficient number, since it is larger than the sum of its proper divisors (45519).

68871217 is a wasteful number, since it uses less digits than its factorization.

68871217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45518.

The product of its digits is 37632, while the sum is 40.

The square root of 68871217 is about 8298.8684168385. The cubic root of 68871217 is about 409.9012591885.

The spelling of 68871217 in words is "sixty-eight million, eight hundred seventy-one thousand, two hundred seventeen".