64998173 has 2 divisors, whose sum is σ = 64998174. Its totient is φ = 64998172.

The previous prime is 64998151. The next prime is 64998181. The reversal of 64998173 is 37189946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42549529 + 22448644 = 6523^2 + 4738^2 .

It is a cyclic number.

It is not a de Polignac number, because 64998173 - 2¹⁴ = 64981789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64994173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32499086 + 32499087.

It is an arithmetic number, because the mean of its divisors is an integer number (32499087).

Almost surely, 2^64998173 is an apocalyptic number.

It is an amenable number.

64998173 is a deficient number, since it is larger than the sum of its proper divisors (1).

64998173 is an equidigital number, since it uses as much as digits as its factorization.

64998173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 64998173 is about 8062.1444417723. The cubic root of 64998173 is about 402.0688087129.

The spelling of 64998173 in words is "sixty-four million, nine hundred ninety-eight thousand, one hundred seventy-three".