172630613 has 2 divisors, whose sum is σ = 172630614. Its totient is φ = 172630612.

The previous prime is 172630589. The next prime is 172630651. The reversal of 172630613 is 316036271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168558289 + 4072324 = 12983^2 + 2018^2 .

It is an emirp because it is prime and its reverse (316036271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172630613 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 (172630673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86315306 + 86315307.

It is an arithmetic number, because the mean of its divisors is an integer number (86315307).

Almost surely, 2^172630613 is an apocalyptic number.

It is an amenable number.

172630613 is a deficient number, since it is larger than the sum of its proper divisors (1).

172630613 is an equidigital number, since it uses as much as digits as its factorization.

172630613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 172630613 is about 13138.8969476132. The cubic root of 172630613 is about 556.8086040506.

Adding to 172630613 its reverse (316036271), we get a palindrome (488666884).

The spelling of 172630613 in words is "one hundred seventy-two million, six hundred thirty thousand, six hundred thirteen".