72074533 has 4 divisors (see below), whose sum is σ = 72331308. Its totient is φ = 71817760.

The previous prime is 72074531. The next prime is 72074549. The reversal of 72074533 is 33547027.

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 59243809 + 12830724 = 7697^2 + 3582^2 .

It is a cyclic number.

It is not a de Polignac number, because 72074533 - 2¹ = 72074531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72074495 and 72074504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72074531) 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, 127966 + ... + 128527.

It is an arithmetic number, because the mean of its divisors is an integer number (18082827).

Almost surely, 2^72074533 is an apocalyptic number.

It is an amenable number.

72074533 is a deficient number, since it is larger than the sum of its proper divisors (256775).

72074533 is a wasteful number, since it uses less digits than its factorization.

72074533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256774.

The product of its (nonzero) digits is 17640, while the sum is 31.

The square root of 72074533 is about 8489.6721373679. The cubic root of 72074533 is about 416.1602659270.

The spelling of 72074533 in words is "seventy-two million, seventy-four thousand, five hundred thirty-three".