67397489 has 2 divisors, whose sum is σ = 67397490. Its totient is φ = 67397488.

The previous prime is 67397437. The next prime is 67397509. The reversal of 67397489 is 98479376.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60715264 + 6682225 = 7792^2 + 2585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67397489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67397489.

It is not a weakly prime, because it can be changed into another prime (67397419) 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 as a sum of consecutive naturals, namely, 33698744 + 33698745.

It is an arithmetic number, because the mean of its divisors is an integer number (33698745).

Almost surely, 2^67397489 is an apocalyptic number.

It is an amenable number.

67397489 is a deficient number, since it is larger than the sum of its proper divisors (1).

67397489 is an equidigital number, since it uses as much as digits as its factorization.

67397489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 53.

The square root of 67397489 is about 8209.5973713697. The cubic root of 67397489 is about 406.9564212708.

The spelling of 67397489 in words is "sixty-seven million, three hundred ninety-seven thousand, four hundred eighty-nine".