68843687 has 4 divisors (see below), whose sum is σ = 75102216. Its totient is φ = 62585160.

The previous prime is 68843657. The next prime is 68843689. The reversal of 68843687 is 78634886.

It is a happy number.

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

It is not a de Polignac number, because 68843687 - 2⁸ = 68843431 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 (68843689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3129248 + ... + 3129269.

It is an arithmetic number, because the mean of its divisors is an integer number (18775554).

Almost surely, 2^68843687 is an apocalyptic number.

68843687 is a deficient number, since it is larger than the sum of its proper divisors (6258529).

68843687 is a wasteful number, since it uses less digits than its factorization.

68843687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6258528.

The product of its digits is 1548288, while the sum is 50.

The square root of 68843687 is about 8297.2095911818. The cubic root of 68843687 is about 409.8466350843.

The spelling of 68843687 in words is "sixty-eight million, eight hundred forty-three thousand, six hundred eighty-seven".