72353573 has 4 divisors (see below), whose sum is σ = 72447948. Its totient is φ = 72259200.

The previous prime is 72353549. The next prime is 72353591. The reversal of 72353573 is 37535327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37535327 = 31 ⋅1210817.

It can be written as a sum of positive squares in 2 ways, for example, as 39715204 + 32638369 = 6302^2 + 5713^2 .

It is a cyclic number.

It is not a de Polignac number, because 72353573 - 2⁶ = 72353509 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 (72353773) 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, 46028 + ... + 47573.

It is an arithmetic number, because the mean of its divisors is an integer number (18111987).

Almost surely, 2^72353573 is an apocalyptic number.

It is an amenable number.

72353573 is a deficient number, since it is larger than the sum of its proper divisors (94375).

72353573 is an equidigital number, since it uses as much as digits as its factorization.

72353573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94374.

The product of its digits is 66150, while the sum is 35.

The square root of 72353573 is about 8506.0903475098. The cubic root of 72353573 is about 416.6966357822.

The spelling of 72353573 in words is "seventy-two million, three hundred fifty-three thousand, five hundred seventy-three".