68136767 has 4 divisors (see below), whose sum is σ = 68493696. Its totient is φ = 67779840.

The previous prime is 68136743. The next prime is 68136769. The reversal of 68136767 is 76763186.

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 68136767 - 2⁶ = 68136703 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 (68136769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178178 + ... + 178559.

It is an arithmetic number, because the mean of its divisors is an integer number (17123424).

Almost surely, 2^68136767 is an apocalyptic number.

68136767 is a deficient number, since it is larger than the sum of its proper divisors (356929).

68136767 is a wasteful number, since it uses less digits than its factorization.

68136767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356928.

The product of its digits is 254016, while the sum is 44.

The square root of 68136767 is about 8254.4998031377. The cubic root of 68136767 is about 408.4389719000.

The spelling of 68136767 in words is "sixty-eight million, one hundred thirty-six thousand, seven hundred sixty-seven".