73550813 has 6 divisors (see below), whose sum is σ = 85559166. Its totient is φ = 63043512.

The previous prime is 73550809. The next prime is 73550819. The reversal of 73550813 is 31805537.

It can be written as a sum of positive squares in only one way, i.e., 68343289 + 5207524 = 8267^2 + 2282^2 .

It is not a de Polignac number, because 73550813 - 2² = 73550809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73550813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73550819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 750470 + ... + 750567.

It is an arithmetic number, because the mean of its divisors is an integer number (14259861).

Almost surely, 2^73550813 is an apocalyptic number.

It is an amenable number.

73550813 is a deficient number, since it is larger than the sum of its proper divisors (12008353).

73550813 is a wasteful number, since it uses less digits than its factorization.

73550813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501051 (or 1501044 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 73550813 is about 8576.1770620714. The cubic root of 73550813 is about 418.9824441127.

The spelling of 73550813 in words is "seventy-three million, five hundred fifty thousand, eight hundred thirteen".