67728607 has 4 divisors (see below), whose sum is σ = 67833936. Its totient is φ = 67623280.

The previous prime is 67728599. The next prime is 67728613. The reversal of 67728607 is 70682776.

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 67728607 - 2³ = 67728599 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 (67728667) 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, 51694 + ... + 52987.

It is an arithmetic number, because the mean of its divisors is an integer number (16958484).

Almost surely, 2^67728607 is an apocalyptic number.

67728607 is a deficient number, since it is larger than the sum of its proper divisors (105329).

67728607 is a wasteful number, since it uses less digits than its factorization.

67728607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105328.

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 67728607 is about 8229.7391817724. The cubic root of 67728607 is about 407.6217800054.

The spelling of 67728607 in words is "sixty-seven million, seven hundred twenty-eight thousand, six hundred seven".