68869871 has 4 divisors (see below), whose sum is σ = 78708432. Its totient is φ = 59031312.

The previous prime is 68869859. The next prime is 68869877. The reversal of 68869871 is 17896886.

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 68869871 - 2¹⁰ = 68868847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68869877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4919270 + ... + 4919283.

It is an arithmetic number, because the mean of its divisors is an integer number (19677108).

Almost surely, 2^68869871 is an apocalyptic number.

68869871 is a deficient number, since it is larger than the sum of its proper divisors (9838561).

68869871 is an equidigital number, since it uses as much as digits as its factorization.

68869871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9838560.

The product of its digits is 1161216, while the sum is 53.

The square root of 68869871 is about 8298.7873210488. The cubic root of 68869871 is about 409.8985888389.

The spelling of 68869871 in words is "sixty-eight million, eight hundred sixty-nine thousand, eight hundred seventy-one".