67493521 has 2 divisors, whose sum is σ = 67493522. Its totient is φ = 67493520.

The previous prime is 67493509. The next prime is 67493533. The reversal of 67493521 is 12539476.

It is a balanced prime because it is at equal distance from previous prime (67493509) and next prime (67493533).

It can be written as a sum of positive squares in only one way, i.e., 37638225 + 29855296 = 6135^2 + 5464^2 .

It is a cyclic number.

It is not a de Polignac number, because 67493521 - 2²¹ = 65396369 is a prime.

It is not a weakly prime, because it can be changed into another prime (67493021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33746760 + 33746761.

It is an arithmetic number, because the mean of its divisors is an integer number (33746761).

Almost surely, 2^67493521 is an apocalyptic number.

It is an amenable number.

67493521 is a deficient number, since it is larger than the sum of its proper divisors (1).

67493521 is an equidigital number, since it uses as much as digits as its factorization.

67493521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 67493521 is about 8215.4440537320. Note that the first 3 decimals coincide. The cubic root of 67493521 is about 407.1496148785.

The spelling of 67493521 in words is "sixty-seven million, four hundred ninety-three thousand, five hundred twenty-one".