73729573 has 4 divisors (see below), whose sum is σ = 73746828. Its totient is φ = 73712320.

The previous prime is 73729553. The next prime is 73729589. The reversal of 73729573 is 37592737.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 65561409 + 8168164 = 8097^2 + 2858^2 .

It is a cyclic number.

It is not a de Polignac number, because 73729573 - 2¹³ = 73721381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73729543) 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, 3063 + ... + 12523.

It is an arithmetic number, because the mean of its divisors is an integer number (18436707).

Almost surely, 2^73729573 is an apocalyptic number.

It is an amenable number.

73729573 is a deficient number, since it is larger than the sum of its proper divisors (17255).

73729573 is an equidigital number, since it uses as much as digits as its factorization.

73729573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17254.

The product of its digits is 277830, while the sum is 43.

The square root of 73729573 is about 8586.5926303744. The cubic root of 73729573 is about 419.3216051314.

The spelling of 73729573 in words is "seventy-three million, seven hundred twenty-nine thousand, five hundred seventy-three".