64493171 has 2 divisors, whose sum is σ = 64493172. Its totient is φ = 64493170.

The previous prime is 64493147. The next prime is 64493203. The reversal of 64493171 is 17139446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64493171 - 2¹⁴ = 64476787 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64493101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32246585 + 32246586.

It is an arithmetic number, because the mean of its divisors is an integer number (32246586).

Almost surely, 2^64493171 is an apocalyptic number.

64493171 is a deficient number, since it is larger than the sum of its proper divisors (1).

64493171 is an equidigital number, since it uses as much as digits as its factorization.

64493171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 64493171 is about 8030.7640358810. The cubic root of 64493171 is about 401.0248117433.

The spelling of 64493171 in words is "sixty-four million, four hundred ninety-three thousand, one hundred seventy-one".