64500173 has 2 divisors, whose sum is σ = 64500174. Its totient is φ = 64500172.

The previous prime is 64500151. The next prime is 64500179. The reversal of 64500173 is 37100546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45333289 + 19166884 = 6733^2 + 4378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64500173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64500179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32250086 + 32250087.

It is an arithmetic number, because the mean of its divisors is an integer number (32250087).

Almost surely, 2^64500173 is an apocalyptic number.

It is an amenable number.

64500173 is a deficient number, since it is larger than the sum of its proper divisors (1).

64500173 is an equidigital number, since it uses as much as digits as its factorization.

64500173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 64500173 is about 8031.1999726068. The cubic root of 64500173 is about 401.0393242572.

The spelling of 64500173 in words is "sixty-four million, five hundred thousand, one hundred seventy-three".