73436813 has 4 divisors (see below), whose sum is σ = 73744320. Its totient is φ = 73129308.

The previous prime is 73436809. The next prime is 73436833. The reversal of 73436813 is 31863437.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73436813 - 2² = 73436809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73436833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153395 + ... + 153872.

It is an arithmetic number, because the mean of its divisors is an integer number (18436080).

Almost surely, 2^73436813 is an apocalyptic number.

It is an amenable number.

73436813 is a deficient number, since it is larger than the sum of its proper divisors (307507).

73436813 is a wasteful number, since it uses less digits than its factorization.

73436813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307506.

The product of its digits is 36288, while the sum is 35.

The square root of 73436813 is about 8569.5281667079. The cubic root of 73436813 is about 418.7658650557.

The spelling of 73436813 in words is "seventy-three million, four hundred thirty-six thousand, eight hundred thirteen".