64541173 has 2 divisors, whose sum is σ = 64541174. Its totient is φ = 64541172.

The previous prime is 64541149. The next prime is 64541177. The reversal of 64541173 is 37114546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35736484 + 28804689 = 5978^2 + 5367^2 .

It is a cyclic number.

It is not a de Polignac number, because 64541173 - 2²¹ = 62444021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64541177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32270586 + 32270587.

It is an arithmetic number, because the mean of its divisors is an integer number (32270587).

Almost surely, 2^64541173 is an apocalyptic number.

It is an amenable number.

64541173 is a deficient number, since it is larger than the sum of its proper divisors (1).

64541173 is an equidigital number, since it uses as much as digits as its factorization.

64541173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 64541173 is about 8033.7521121827. The cubic root of 64541173 is about 401.1242807712.

The spelling of 64541173 in words is "sixty-four million, five hundred forty-one thousand, one hundred seventy-three".