172520633 has 2 divisors, whose sum is σ = 172520634. Its totient is φ = 172520632.

The previous prime is 172520567. The next prime is 172520639. The reversal of 172520633 is 336025271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172475689 + 44944 = 13133^2 + 212^2 .

It is a cyclic number.

It is not a de Polignac number, because 172520633 - 2¹⁶ = 172455097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172520596 and 172520605.

It is not a weakly prime, because it can be changed into another prime (172520639) 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, 86260316 + 86260317.

It is an arithmetic number, because the mean of its divisors is an integer number (86260317).

Almost surely, 2^172520633 is an apocalyptic number.

It is an amenable number.

172520633 is a deficient number, since it is larger than the sum of its proper divisors (1).

172520633 is an equidigital number, since it uses as much as digits as its factorization.

172520633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 172520633 is about 13134.7109979626. The cubic root of 172520633 is about 556.6903345302.

The spelling of 172520633 in words is "one hundred seventy-two million, five hundred twenty thousand, six hundred thirty-three".