72741533 has 2 divisors, whose sum is σ = 72741534. Its totient is φ = 72741532.

The previous prime is 72741523. The next prime is 72741551. The reversal of 72741533 is 33514727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58400164 + 14341369 = 7642^2 + 3787^2 .

It is a cyclic number.

It is not a de Polignac number, because 72741533 - 2¹⁸ = 72479389 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72741533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72741523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36370766 + 36370767.

It is an arithmetic number, because the mean of its divisors is an integer number (36370767).

Almost surely, 2^72741533 is an apocalyptic number.

It is an amenable number.

72741533 is a deficient number, since it is larger than the sum of its proper divisors (1).

72741533 is an equidigital number, since it uses as much as digits as its factorization.

72741533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 32.

The square root of 72741533 is about 8528.8646958432. The cubic root of 72741533 is about 417.4400846287.

The spelling of 72741533 in words is "seventy-two million, seven hundred forty-one thousand, five hundred thirty-three".