68816887 has 4 divisors (see below), whose sum is σ = 69426000. Its totient is φ = 68207776.

The previous prime is 68816857. The next prime is 68816903. The reversal of 68816887 is 78861886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78861886 = 2 ⋅39430943.

It is a cyclic number.

It is not a de Polignac number, because 68816887 - 2²³ = 60428279 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 (68816857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304387 + ... + 304612.

It is an arithmetic number, because the mean of its divisors is an integer number (17356500).

Almost surely, 2^68816887 is an apocalyptic number.

68816887 is a deficient number, since it is larger than the sum of its proper divisors (609113).

68816887 is a wasteful number, since it uses less digits than its factorization.

68816887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609112.

The product of its digits is 1032192, while the sum is 52.

The square root of 68816887 is about 8295.5944331916. The cubic root of 68816887 is about 409.7934454315.

The spelling of 68816887 in words is "sixty-eight million, eight hundred sixteen thousand, eight hundred eighty-seven".