67072297 has 2 divisors, whose sum is σ = 67072298. Its totient is φ = 67072296.

The previous prime is 67072289. The next prime is 67072307. The reversal of 67072297 is 79227076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61763881 + 5308416 = 7859^2 + 2304^2 .

It is a cyclic number.

It is not a de Polignac number, because 67072297 - 2³ = 67072289 is a prime.

It is not a weakly prime, because it can be changed into another prime (67072207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33536148 + 33536149.

It is an arithmetic number, because the mean of its divisors is an integer number (33536149).

Almost surely, 2^67072297 is an apocalyptic number.

It is an amenable number.

67072297 is a deficient number, since it is larger than the sum of its proper divisors (1).

67072297 is an equidigital number, since it uses as much as digits as its factorization.

67072297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 67072297 is about 8189.7678233269. The cubic root of 67072297 is about 406.3008459594.

The spelling of 67072297 in words is "sixty-seven million, seventy-two thousand, two hundred ninety-seven".