172730113 has 2 divisors, whose sum is σ = 172730114. Its totient is φ = 172730112.

The previous prime is 172730071. The next prime is 172730137. The reversal of 172730113 is 311037271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136585969 + 36144144 = 11687^2 + 6012^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172730113 is a prime.

It is not a weakly prime, because it can be changed into another prime (172730153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86365056 + 86365057.

It is an arithmetic number, because the mean of its divisors is an integer number (86365057).

Almost surely, 2^172730113 is an apocalyptic number.

It is an amenable number.

172730113 is a deficient number, since it is larger than the sum of its proper divisors (1).

172730113 is an equidigital number, since it uses as much as digits as its factorization.

172730113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 172730113 is about 13142.6828691862. The cubic root of 172730113 is about 556.9155603900.

Adding to 172730113 its reverse (311037271), we get a palindrome (483767384).

The spelling of 172730113 in words is "one hundred seventy-two million, seven hundred thirty thousand, one hundred thirteen".