73321649 has 2 divisors, whose sum is σ = 73321650. Its totient is φ = 73321648.

The previous prime is 73321639. The next prime is 73321667. The reversal of 73321649 is 94612337.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68227600 + 5094049 = 8260^2 + 2257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73321649 is a prime.

It is not a weakly prime, because it can be changed into another prime (73321639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36660824 + 36660825.

It is an arithmetic number, because the mean of its divisors is an integer number (36660825).

Almost surely, 2^73321649 is an apocalyptic number.

It is an amenable number.

73321649 is a deficient number, since it is larger than the sum of its proper divisors (1).

73321649 is an equidigital number, since it uses as much as digits as its factorization.

73321649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 35.

The square root of 73321649 is about 8562.8061405126. The cubic root of 73321649 is about 418.5468469097.

The spelling of 73321649 in words is "seventy-three million, three hundred twenty-one thousand, six hundred forty-nine".