67738009 has 4 divisors (see below), whose sum is σ = 69568804. Its totient is φ = 65907216.

The previous prime is 67738003. The next prime is 67738019. The reversal of 67738009 is 90083776.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59598400 + 8139609 = 7720^2 + 2853^2 .

It is a cyclic number.

It is not a de Polignac number, because 67738009 - 2⁹ = 67737497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67738003) 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, 915342 + ... + 915415.

It is an arithmetic number, because the mean of its divisors is an integer number (17392201).

Almost surely, 2^67738009 is an apocalyptic number.

It is an amenable number.

67738009 is a deficient number, since it is larger than the sum of its proper divisors (1830795).

67738009 is a wasteful number, since it uses less digits than its factorization.

67738009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830794.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 67738009 is about 8230.3103829686. The cubic root of 67738009 is about 407.6406409802.

The spelling of 67738009 in words is "sixty-seven million, seven hundred thirty-eight thousand, nine".