172736329 has 2 divisors, whose sum is σ = 172736330. Its totient is φ = 172736328.

The previous prime is 172736293. The next prime is 172736357. The reversal of 172736329 is 923637271.

Together with previous prime (172736293) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172659600 + 76729 = 13140^2 + 277^2 .

It is a cyclic number.

It is not a de Polignac number, because 172736329 - 2¹¹ = 172734281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172736291 and 172736300.

It is not a weakly prime, because it can be changed into another prime (172736359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86368164 + 86368165.

It is an arithmetic number, because the mean of its divisors is an integer number (86368165).

Almost surely, 2^172736329 is an apocalyptic number.

It is an amenable number.

172736329 is a deficient number, since it is larger than the sum of its proper divisors (1).

172736329 is an equidigital number, since it uses as much as digits as its factorization.

172736329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 40.

The square root of 172736329 is about 13142.9193484553. The cubic root of 172736329 is about 556.9222408418.

The spelling of 172736329 in words is "one hundred seventy-two million, seven hundred thirty-six thousand, three hundred twenty-nine".