67397271 has 4 divisors (see below), whose sum is σ = 89863032. Its totient is φ = 44931512.

The previous prime is 67397269. The next prime is 67397303. The reversal of 67397271 is 17279376.

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 67397271 - 2¹ = 67397269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67397221) 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, 11232876 + ... + 11232881.

It is an arithmetic number, because the mean of its divisors is an integer number (22465758).

Almost surely, 2^67397271 is an apocalyptic number.

67397271 is a deficient number, since it is larger than the sum of its proper divisors (22465761).

67397271 is a wasteful number, since it uses less digits than its factorization.

67397271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22465760.

The product of its digits is 111132, while the sum is 42.

The square root of 67397271 is about 8209.5840942157. The cubic root of 67397271 is about 406.9559824978.

The spelling of 67397271 in words is "sixty-seven million, three hundred ninety-seven thousand, two hundred seventy-one".