73328813 has 2 divisors, whose sum is σ = 73328814. Its totient is φ = 73328812.

The previous prime is 73328779. The next prime is 73328821. The reversal of 73328813 is 31882337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73324969 + 3844 = 8563^2 + 62^2 .

It is a cyclic number.

It is not a de Polignac number, because 73328813 - 2¹⁰ = 73327789 is a prime.

It is a super-2 number, since 2×73328813² = 10754229631977938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73328863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36664406 + 36664407.

It is an arithmetic number, because the mean of its divisors is an integer number (36664407).

Almost surely, 2^73328813 is an apocalyptic number.

It is an amenable number.

73328813 is a deficient number, since it is larger than the sum of its proper divisors (1).

73328813 is an equidigital number, since it uses as much as digits as its factorization.

73328813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

The square root of 73328813 is about 8563.2244511049. The cubic root of 73328813 is about 418.5604780451.

The spelling of 73328813 in words is "seventy-three million, three hundred twenty-eight thousand, eight hundred thirteen".