73020811 has 4 divisors (see below), whose sum is σ = 75538800. Its totient is φ = 70502824.

The previous prime is 73020799. The next prime is 73020817. The reversal of 73020811 is 11802037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11802037 = 13 ⋅907849.

It is a cyclic number.

It is not a de Polignac number, because 73020811 - 2⁷ = 73020683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73020817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1258951 + ... + 1259008.

It is an arithmetic number, because the mean of its divisors is an integer number (18884700).

Almost surely, 2^73020811 is an apocalyptic number.

73020811 is a deficient number, since it is larger than the sum of its proper divisors (2517989).

73020811 is a wasteful number, since it uses less digits than its factorization.

73020811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517988.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 73020811 is about 8545.2215301887. The cubic root of 73020811 is about 417.9736310373.

Adding to 73020811 its reverse (11802037), we get a palindrome (84822848).

The spelling of 73020811 in words is "seventy-three million, twenty thousand, eight hundred eleven".