72004453 has 4 divisors (see below), whose sum is σ = 72092140. Its totient is φ = 71916768.

The previous prime is 72004451. The next prime is 72004459. The reversal of 72004453 is 35440027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35440027 = 7 ⋅5062861.

It can be written as a sum of positive squares in 2 ways, for example, as 33849124 + 38155329 = 5818^2 + 6177^2 .

It is a cyclic number.

It is not a de Polignac number, because 72004453 - 2¹ = 72004451 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 (72004451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42600 + ... + 44257.

It is an arithmetic number, because the mean of its divisors is an integer number (18023035).

Almost surely, 2^72004453 is an apocalyptic number.

It is an amenable number.

72004453 is a deficient number, since it is larger than the sum of its proper divisors (87687).

72004453 is an equidigital number, since it uses as much as digits as its factorization.

72004453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87686.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 72004453 is about 8485.5437657230. The cubic root of 72004453 is about 416.0253409273.

The spelling of 72004453 in words is "seventy-two million, four thousand, four hundred fifty-three".