67791689 has 4 divisors (see below), whose sum is σ = 77476224. Its totient is φ = 58107156.

The previous prime is 67791673. The next prime is 67791707. The reversal of 67791689 is 98619776.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67791689 - 2⁴ = 67791673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67791689.

It is not an unprimeable number, because it can be changed into a prime (67791629) 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, 4842257 + ... + 4842270.

It is an arithmetic number, because the mean of its divisors is an integer number (19369056).

Almost surely, 2^67791689 is an apocalyptic number.

It is an amenable number.

67791689 is a deficient number, since it is larger than the sum of its proper divisors (9684535).

67791689 is an equidigital number, since it uses as much as digits as its factorization.

67791689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9684534.

The product of its digits is 1143072, while the sum is 53.

The square root of 67791689 is about 8233.5708535240. The cubic root of 67791689 is about 407.7482928593.

The spelling of 67791689 in words is "sixty-seven million, seven hundred ninety-one thousand, six hundred eighty-nine".