64989073 has 2 divisors, whose sum is σ = 64989074. Its totient is φ = 64989072.

The previous prime is 64989061. The next prime is 64989091. The reversal of 64989073 is 37098946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53100369 + 11888704 = 7287^2 + 3448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64989073 is a prime.

It is not a weakly prime, because it can be changed into another prime (64989013) 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, 32494536 + 32494537.

It is an arithmetic number, because the mean of its divisors is an integer number (32494537).

Almost surely, 2^64989073 is an apocalyptic number.

It is an amenable number.

64989073 is a deficient number, since it is larger than the sum of its proper divisors (1).

64989073 is an equidigital number, since it uses as much as digits as its factorization.

64989073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 64989073 is about 8061.5800560436. The cubic root of 64989073 is about 402.0500440986.

The spelling of 64989073 in words is "sixty-four million, nine hundred eighty-nine thousand, seventy-three".