172317461 has 2 divisors, whose sum is σ = 172317462. Its totient is φ = 172317460.

The previous prime is 172317443. The next prime is 172317527. The reversal of 172317461 is 164713271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112487236 + 59830225 = 10606^2 + 7735^2 .

It is an emirp because it is prime and its reverse (164713271) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172317461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172317161) 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, 86158730 + 86158731.

It is an arithmetic number, because the mean of its divisors is an integer number (86158731).

Almost surely, 2^172317461 is an apocalyptic number.

It is an amenable number.

172317461 is a deficient number, since it is larger than the sum of its proper divisors (1).

172317461 is an equidigital number, since it uses as much as digits as its factorization.

172317461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 32.

The square root of 172317461 is about 13126.9745562334. The cubic root of 172317461 is about 556.4717165880.

The spelling of 172317461 in words is "one hundred seventy-two million, three hundred seventeen thousand, four hundred sixty-one".