68442787 has 4 divisors (see below), whose sum is σ = 78220336. Its totient is φ = 58665240.

The previous prime is 68442767. The next prime is 68442791. The reversal of 68442787 is 78724486.

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 68442787 - 2⁷ = 68442659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68442727) 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, 4888764 + ... + 4888777.

It is an arithmetic number, because the mean of its divisors is an integer number (19555084).

Almost surely, 2^68442787 is an apocalyptic number.

68442787 is a deficient number, since it is larger than the sum of its proper divisors (9777549).

68442787 is an equidigital number, since it uses as much as digits as its factorization.

68442787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9777548.

The product of its digits is 602112, while the sum is 46.

The square root of 68442787 is about 8273.0155928778. The cubic root of 68442787 is about 409.0495274221.

The spelling of 68442787 in words is "sixty-eight million, four hundred forty-two thousand, seven hundred eighty-seven".