67424257 has 2 divisors, whose sum is σ = 67424258. Its totient is φ = 67424256.

The previous prime is 67424233. The next prime is 67424297. The reversal of 67424257 is 75242476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67092481 + 331776 = 8191^2 + 576^2 .

It is a cyclic number.

It is not a de Polignac number, because 67424257 - 2¹¹ = 67422209 is a prime.

It is not a weakly prime, because it can be changed into another prime (67424297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33712128 + 33712129.

It is an arithmetic number, because the mean of its divisors is an integer number (33712129).

Almost surely, 2^67424257 is an apocalyptic number.

It is an amenable number.

67424257 is a deficient number, since it is larger than the sum of its proper divisors (1).

67424257 is an equidigital number, since it uses as much as digits as its factorization.

67424257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 37.

The square root of 67424257 is about 8211.2274965440. The cubic root of 67424257 is about 407.0102905757.

The spelling of 67424257 in words is "sixty-seven million, four hundred twenty-four thousand, two hundred fifty-seven".