67128097 has 4 divisors (see below), whose sum is σ = 67144896. Its totient is φ = 67111300.

The previous prime is 67128091. The next prime is 67128151. The reversal of 67128097 is 79082176.

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 67128097 - 2¹¹ = 67126049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67128091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428 + ... + 11674.

It is an arithmetic number, because the mean of its divisors is an integer number (16786224).

Almost surely, 2^67128097 is an apocalyptic number.

It is an amenable number.

67128097 is a deficient number, since it is larger than the sum of its proper divisors (16799).

67128097 is a wasteful number, since it uses less digits than its factorization.

67128097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16798.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 67128097 is about 8193.1738050648. The cubic root of 67128097 is about 406.4134871143.

It can be divided in two parts, 67 and 128097, that added together give a square (128164 = 358²).

The spelling of 67128097 in words is "sixty-seven million, one hundred twenty-eight thousand, ninety-seven".