68140887 has 8 divisors (see below), whose sum is σ = 90893040. Its totient is φ = 45408000.

The previous prime is 68140847. The next prime is 68140903. The reversal of 68140887 is 78804186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68140887 - 2⁶ = 68140823 is a prime.

It is a super-2 number, since 2×68140887² = 9286360962293538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68140817) 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 7 ways as a sum of consecutive naturals, for example, 9637 + ... + 15137.

It is an arithmetic number, because the mean of its divisors is an integer number (11361630).

Almost surely, 2^68140887 is an apocalyptic number.

68140887 is a deficient number, since it is larger than the sum of its proper divisors (22752153).

68140887 is a wasteful number, since it uses less digits than its factorization.

68140887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9633.

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 68140887 is about 8254.7493602168. The cubic root of 68140887 is about 408.4472040422.

The spelling of 68140887 in words is "sixty-eight million, one hundred forty thousand, eight hundred eighty-seven".