68855887 has 8 divisors (see below), whose sum is σ = 69932016. Its totient is φ = 67785792.

The previous prime is 68855873. The next prime is 68855909. The reversal of 68855887 is 78855886.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68855887 is a prime.

It is a super-2 number, since 2×68855887² = 9482266349113538, 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 (68855807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25003 + ... + 27619.

It is an arithmetic number, because the mean of its divisors is an integer number (8741502).

Almost surely, 2^68855887 is an apocalyptic number.

68855887 is a deficient number, since it is larger than the sum of its proper divisors (1076129).

68855887 is a wasteful number, since it uses less digits than its factorization.

68855887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017.

The product of its digits is 4300800, while the sum is 55.

The square root of 68855887 is about 8297.9447455379. The cubic root of 68855887 is about 409.8708437123.

Subtracting 68855887 from its reverse (78855886), we obtain a palindrome (9999999).

The spelling of 68855887 in words is "sixty-eight million, eight hundred fifty-five thousand, eight hundred eighty-seven".