67344257 has 2 divisors, whose sum is σ = 67344258. Its totient is φ = 67344256.

The previous prime is 67344247. The next prime is 67344283. The reversal of 67344257 is 75244376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39137536 + 28206721 = 6256^2 + 5311^2 .

It is a cyclic number.

It is not a de Polignac number, because 67344257 - 2⁸ = 67344001 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 67344257.

It is not a weakly prime, because it can be changed into another prime (67344217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33672128 + 33672129.

It is an arithmetic number, because the mean of its divisors is an integer number (33672129).

Almost surely, 2^67344257 is an apocalyptic number.

It is an amenable number.

67344257 is a deficient number, since it is larger than the sum of its proper divisors (1).

67344257 is an equidigital number, since it uses as much as digits as its factorization.

67344257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 38.

The square root of 67344257 is about 8206.3546718382. The cubic root of 67344257 is about 406.8492520455.

The spelling of 67344257 in words is "sixty-seven million, three hundred forty-four thousand, two hundred fifty-seven".