67420069 has 4 divisors (see below), whose sum is σ = 67437196. Its totient is φ = 67402944.

The previous prime is 67420063. The next prime is 67420091. The reversal of 67420069 is 96002476.

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 41796225 + 25623844 = 6465^2 + 5062^2 .

It is a cyclic number.

It is not a de Polignac number, because 67420069 - 2⁷ = 67419941 is a prime.

It is a super-2 number, since 2×67420069² = 9090931407929522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67420063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637 + ... + 11629.

It is an arithmetic number, because the mean of its divisors is an integer number (16859299).

Almost surely, 2^67420069 is an apocalyptic number.

It is an amenable number.

67420069 is a deficient number, since it is larger than the sum of its proper divisors (17127).

67420069 is a wasteful number, since it uses less digits than its factorization.

67420069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17126.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 67420069 is about 8210.9724759008. The cubic root of 67420069 is about 407.0018633693.

The spelling of 67420069 in words is "sixty-seven million, four hundred twenty thousand, sixty-nine".