67441921 has 2 divisors, whose sum is σ = 67441922. Its totient is φ = 67441920.

The previous prime is 67441901. The next prime is 67441937. The reversal of 67441921 is 12914476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55711296 + 11730625 = 7464^2 + 3425^2 .

It is a cyclic number.

It is not a de Polignac number, because 67441921 - 2⁵ = 67441889 is a prime.

It is not a weakly prime, because it can be changed into another prime (67441901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33720960 + 33720961.

It is an arithmetic number, because the mean of its divisors is an integer number (33720961).

Almost surely, 2^67441921 is an apocalyptic number.

It is an amenable number.

67441921 is a deficient number, since it is larger than the sum of its proper divisors (1).

67441921 is an equidigital number, since it uses as much as digits as its factorization.

67441921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 67441921 is about 8212.3030265572. The cubic root of 67441921 is about 407.0458307128.

The spelling of 67441921 in words is "sixty-seven million, four hundred forty-one thousand, nine hundred twenty-one".