72575773 has 4 divisors (see below), whose sum is σ = 72592828. Its totient is φ = 72558720.

The previous prime is 72575761. The next prime is 72575779. The reversal of 72575773 is 37757527.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37757527 = 17 ⋅2221031.

It can be written as a sum of positive squares in 2 ways, for example, as 17623204 + 54952569 = 4198^2 + 7413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72575773 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 (72575779) 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, 3715 + ... + 12607.

It is an arithmetic number, because the mean of its divisors is an integer number (18148207).

Almost surely, 2^72575773 is an apocalyptic number.

It is an amenable number.

72575773 is a deficient number, since it is larger than the sum of its proper divisors (17055).

72575773 is an equidigital number, since it uses as much as digits as its factorization.

72575773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17054.

The product of its digits is 360150, while the sum is 43.

The square root of 72575773 is about 8519.1415647353. The cubic root of 72575773 is about 417.1227624994.

The spelling of 72575773 in words is "seventy-two million, five hundred seventy-five thousand, seven hundred seventy-three".