67456321 has 2 divisors, whose sum is σ = 67456322. Its totient is φ = 67456320.

The previous prime is 67456313. The next prime is 67456339. The reversal of 67456321 is 12365476.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58982400 + 8473921 = 7680^2 + 2911^2 .

It is a cyclic number.

It is not a de Polignac number, because 67456321 - 2³ = 67456313 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (67456351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33728160 + 33728161.

It is an arithmetic number, because the mean of its divisors is an integer number (33728161).

Almost surely, 2^67456321 is an apocalyptic number.

It is an amenable number.

67456321 is a deficient number, since it is larger than the sum of its proper divisors (1).

67456321 is an equidigital number, since it uses as much as digits as its factorization.

67456321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 34.

The square root of 67456321 is about 8213.1797131196. The cubic root of 67456321 is about 407.0747990595.

The spelling of 67456321 in words is "sixty-seven million, four hundred fifty-six thousand, three hundred twenty-one".