67145737 has 2 divisors, whose sum is σ = 67145738. Its totient is φ = 67145736.

The previous prime is 67145693. The next prime is 67145773. The reversal of 67145737 is 73754176.

Together with next prime (67145773) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39488656 + 27657081 = 6284^2 + 5259^2 .

It is a cyclic number.

It is not a de Polignac number, because 67145737 - 2⁷ = 67145609 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67145737.

It is not a weakly prime, because it can be changed into another prime (67148737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33572868 + 33572869.

It is an arithmetic number, because the mean of its divisors is an integer number (33572869).

Almost surely, 2^67145737 is an apocalyptic number.

It is an amenable number.

67145737 is a deficient number, since it is larger than the sum of its proper divisors (1).

67145737 is an equidigital number, since it uses as much as digits as its factorization.

67145737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123480, while the sum is 40.

The square root of 67145737 is about 8194.2502402599. The cubic root of 67145737 is about 406.4490832673.

The spelling of 67145737 in words is "sixty-seven million, one hundred forty-five thousand, seven hundred thirty-seven".