67373521 has 2 divisors, whose sum is σ = 67373522. Its totient is φ = 67373520.

The previous prime is 67373503. The next prime is 67373539. The reversal of 67373521 is 12537376.

It is a balanced prime because it is at equal distance from previous prime (67373503) and next prime (67373539).

It can be written as a sum of positive squares in only one way, i.e., 55711296 + 11662225 = 7464^2 + 3415^2 .

It is a cyclic number.

It is not a de Polignac number, because 67373521 - 2⁷ = 67373393 is a prime.

It is not a weakly prime, because it can be changed into another prime (67373591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33686760 + 33686761.

It is an arithmetic number, because the mean of its divisors is an integer number (33686761).

Almost surely, 2^67373521 is an apocalyptic number.

It is an amenable number.

67373521 is a deficient number, since it is larger than the sum of its proper divisors (1).

67373521 is an equidigital number, since it uses as much as digits as its factorization.

67373521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 34.

The square root of 67373521 is about 8208.1374866653. The cubic root of 67373521 is about 406.9081747258.

The spelling of 67373521 in words is "sixty-seven million, three hundred seventy-three thousand, five hundred twenty-one".