68861587 has 4 divisors (see below), whose sum is σ = 69317776. Its totient is φ = 68405400.

The previous prime is 68861581. The next prime is 68861623. The reversal of 68861587 is 78516886.

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 68861587 - 2⁷ = 68861459 is a prime.

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 68861587.

It is not an unprimeable number, because it can be changed into a prime (68861581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227868 + ... + 228169.

It is an arithmetic number, because the mean of its divisors is an integer number (17329444).

Almost surely, 2^68861587 is an apocalyptic number.

68861587 is a deficient number, since it is larger than the sum of its proper divisors (456189).

68861587 is a wasteful number, since it uses less digits than its factorization.

68861587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456188.

The product of its digits is 645120, while the sum is 49.

The square root of 68861587 is about 8298.2881969717. The cubic root of 68861587 is about 409.8821533206.

The spelling of 68861587 in words is "sixty-eight million, eight hundred sixty-one thousand, five hundred eighty-seven".