172138033 has 2 divisors, whose sum is σ = 172138034. Its totient is φ = 172138032.

The previous prime is 172138019. The next prime is 172138063. The reversal of 172138033 is 330831271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108409744 + 63728289 = 10412^2 + 7983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172138033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172137992 and 172138010.

It is not a weakly prime, because it can be changed into another prime (172138013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86069016 + 86069017.

It is an arithmetic number, because the mean of its divisors is an integer number (86069017).

Almost surely, 2^172138033 is an apocalyptic number.

It is an amenable number.

172138033 is a deficient number, since it is larger than the sum of its proper divisors (1).

172138033 is an equidigital number, since it uses as much as digits as its factorization.

172138033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 172138033 is about 13120.1384520134. The cubic root of 172138033 is about 556.2785048221.

The spelling of 172138033 in words is "one hundred seventy-two million, one hundred thirty-eight thousand, thirty-three".