72432533 has 2 divisors, whose sum is σ = 72432534. Its totient is φ = 72432532.

The previous prime is 72432439. The next prime is 72432551. The reversal of 72432533 is 33523427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63712324 + 8720209 = 7982^2 + 2953^2 .

It is a cyclic number.

It is not a de Polignac number, because 72432533 - 2⁸ = 72432277 is a prime.

It is a super-3 number, since 3×72432533³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72432496 and 72432505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72432553) 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 as a sum of consecutive naturals, namely, 36216266 + 36216267.

It is an arithmetic number, because the mean of its divisors is an integer number (36216267).

Almost surely, 2^72432533 is an apocalyptic number.

It is an amenable number.

72432533 is a deficient number, since it is larger than the sum of its proper divisors (1).

72432533 is an equidigital number, since it uses as much as digits as its factorization.

72432533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 29.

The square root of 72432533 is about 8510.7304621871. The cubic root of 72432533 is about 416.8481620689.

The spelling of 72432533 in words is "seventy-two million, four hundred thirty-two thousand, five hundred thirty-three".