65173489 has 2 divisors, whose sum is σ = 65173490. Its totient is φ = 65173488.

The previous prime is 65173483. The next prime is 65173531. The reversal of 65173489 is 98437156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57638464 + 7535025 = 7592^2 + 2745^2 .

It is a cyclic number.

It is not a de Polignac number, because 65173489 - 2³ = 65173481 is a prime.

It is not a weakly prime, because it can be changed into another prime (65173481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32586744 + 32586745.

It is an arithmetic number, because the mean of its divisors is an integer number (32586745).

Almost surely, 2^65173489 is an apocalyptic number.

It is an amenable number.

65173489 is a deficient number, since it is larger than the sum of its proper divisors (1).

65173489 is an equidigital number, since it uses as much as digits as its factorization.

65173489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 65173489 is about 8073.0099095690. The cubic root of 65173489 is about 402.4299768881.

The spelling of 65173489 in words is "sixty-five million, one hundred seventy-three thousand, four hundred eighty-nine".