68737687 has 4 divisors (see below), whose sum is σ = 72355480. Its totient is φ = 65119896.

The previous prime is 68737679. The next prime is 68737709. The reversal of 68737687 is 78673786.

It is a happy number.

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 68737687 - 2³ = 68737679 is a prime.

It is a super-2 number, since 2×68737687² = 9449739228219938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68737657) 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, 1808868 + ... + 1808905.

It is an arithmetic number, because the mean of its divisors is an integer number (18088870).

Almost surely, 2^68737687 is an apocalyptic number.

68737687 is a deficient number, since it is larger than the sum of its proper divisors (3617793).

68737687 is a wasteful number, since it uses less digits than its factorization.

68737687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617792.

The product of its digits is 2370816, while the sum is 52.

The square root of 68737687 is about 8290.8194408032. The cubic root of 68737687 is about 409.6361773485.

The spelling of 68737687 in words is "sixty-eight million, seven hundred thirty-seven thousand, six hundred eighty-seven".