73528573 has 4 divisors (see below), whose sum is σ = 74774880. Its totient is φ = 72282268.

The previous prime is 73528541. The next prime is 73528577. The reversal of 73528573 is 37582537.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37582537 = 103 ⋅364879.

It is a cyclic number.

It is not a de Polignac number, because 73528573 - 2⁵ = 73528541 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 Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73528577) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623065 + ... + 623182.

It is an arithmetic number, because the mean of its divisors is an integer number (18693720).

Almost surely, 2^73528573 is an apocalyptic number.

It is an amenable number.

73528573 is a deficient number, since it is larger than the sum of its proper divisors (1246307).

73528573 is a wasteful number, since it uses less digits than its factorization.

73528573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246306.

The product of its digits is 176400, while the sum is 40.

The square root of 73528573 is about 8574.8803490195. The cubic root of 73528573 is about 418.9402097782.

The spelling of 73528573 in words is "seventy-three million, five hundred twenty-eight thousand, five hundred seventy-three".