68865987 has 4 divisors (see below), whose sum is σ = 91821320. Its totient is φ = 45910656.

The previous prime is 68865983. The next prime is 68866003. The reversal of 68865987 is 78956886.

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

It is not a de Polignac number, because 68865987 - 2² = 68865983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68865983) 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, 11477662 + ... + 11477667.

It is an arithmetic number, because the mean of its divisors is an integer number (22955330).

Almost surely, 2^68865987 is an apocalyptic number.

68865987 is a deficient number, since it is larger than the sum of its proper divisors (22955333).

68865987 is a wasteful number, since it uses less digits than its factorization.

68865987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22955332.

The product of its digits is 5806080, while the sum is 57.

The square root of 68865987 is about 8298.5533076555. The cubic root of 68865987 is about 409.8908831178.

The spelling of 68865987 in words is "sixty-eight million, eight hundred sixty-five thousand, nine hundred eighty-seven".