73318729 has 4 divisors (see below), whose sum is σ = 79984080. Its totient is φ = 66653380.

The previous prime is 73318723. The next prime is 73318753. The reversal of 73318729 is 92781337.

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 73318729 - 2⁵ = 73318697 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 73318691 and 73318700.

It is not an unprimeable number, because it can be changed into a prime (73318723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3332659 + ... + 3332680.

It is an arithmetic number, because the mean of its divisors is an integer number (19996020).

Almost surely, 2^73318729 is an apocalyptic number.

It is an amenable number.

73318729 is a deficient number, since it is larger than the sum of its proper divisors (6665351).

73318729 is a wasteful number, since it uses less digits than its factorization.

73318729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6665350.

The product of its digits is 63504, while the sum is 40.

The square root of 73318729 is about 8562.6356339622. The cubic root of 73318729 is about 418.5412906926.

It can be divided in two parts, 73318 and 729, that added together give a palindrome (74047).

The spelling of 73318729 in words is "seventy-three million, three hundred eighteen thousand, seven hundred twenty-nine".