73173253 has 4 divisors (see below), whose sum is σ = 77477580. Its totient is φ = 68868928.

The previous prime is 73173251. The next prime is 73173259. The reversal of 73173253 is 35237137.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49815364 + 23357889 = 7058^2 + 4833^2 .

It is a cyclic number.

It is not a de Polignac number, because 73173253 - 2¹ = 73173251 is a prime.

It is a Smith number, since the sum of its digits (31) 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 (73173251) 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, 2152138 + ... + 2152171.

It is an arithmetic number, because the mean of its divisors is an integer number (19369395).

Almost surely, 2^73173253 is an apocalyptic number.

It is an amenable number.

73173253 is a deficient number, since it is larger than the sum of its proper divisors (4304327).

73173253 is a wasteful number, since it uses less digits than its factorization.

73173253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4304326.

The product of its digits is 13230, while the sum is 31.

The square root of 73173253 is about 8554.1366016682. The cubic root of 73173253 is about 418.2642899481.

It can be divided in two parts, 731 and 73253, that added together give a square (73984 = 272²).

The spelling of 73173253 in words is "seventy-three million, one hundred seventy-three thousand, two hundred fifty-three".