68551887 has 4 divisors (see below), whose sum is σ = 91402520. Its totient is φ = 45701256.

The previous prime is 68551883. The next prime is 68551909. The reversal of 68551887 is 78815586.

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

It is not a de Polignac number, because 68551887 - 2² = 68551883 is a prime.

It is a super-2 number, since 2×68551887² = 9398722422521538, 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 (68551883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11425312 + ... + 11425317.

It is an arithmetic number, because the mean of its divisors is an integer number (22850630).

Almost surely, 2^68551887 is an apocalyptic number.

68551887 is a deficient number, since it is larger than the sum of its proper divisors (22850633).

68551887 is a wasteful number, since it uses less digits than its factorization.

68551887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22850632.

The product of its digits is 537600, while the sum is 48.

The square root of 68551887 is about 8279.6066935574. The cubic root of 68551887 is about 409.2667580655.

The spelling of 68551887 in words is "sixty-eight million, five hundred fifty-one thousand, eight hundred eighty-seven".