68445767 has 4 divisors (see below), whose sum is σ = 73710840. Its totient is φ = 63180696.

The previous prime is 68445763. The next prime is 68445779. The reversal of 68445767 is 76754486.

It is a happy number.

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 68445767 - 2² = 68445763 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 (68445763) 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, 2632517 + ... + 2632542.

It is an arithmetic number, because the mean of its divisors is an integer number (18427710).

Almost surely, 2^68445767 is an apocalyptic number.

68445767 is a deficient number, since it is larger than the sum of its proper divisors (5265073).

68445767 is a wasteful number, since it uses less digits than its factorization.

68445767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5265072.

The product of its digits is 1128960, while the sum is 47.

The square root of 68445767 is about 8273.1956945306. The cubic root of 68445767 is about 409.0554640102.

The spelling of 68445767 in words is "sixty-eight million, four hundred forty-five thousand, seven hundred sixty-seven".