172974533 has 2 divisors, whose sum is σ = 172974534. Its totient is φ = 172974532.

The previous prime is 172974517. The next prime is 172974583. The reversal of 172974533 is 335479271.

172974533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171034084 + 1940449 = 13078^2 + 1393^2 .

It is an emirp because it is prime and its reverse (335479271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172974533 - 2⁴ = 172974517 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172974583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86487266 + 86487267.

It is an arithmetic number, because the mean of its divisors is an integer number (86487267).

Almost surely, 2^172974533 is an apocalyptic number.

It is an amenable number.

172974533 is a deficient number, since it is larger than the sum of its proper divisors (1).

172974533 is an equidigital number, since it uses as much as digits as its factorization.

172974533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 41.

The square root of 172974533 is about 13151.9782922570. The cubic root of 172974533 is about 557.1781224946.

The spelling of 172974533 in words is "one hundred seventy-two million, nine hundred seventy-four thousand, five hundred thirty-three".