172481149 has 2 divisors, whose sum is σ = 172481150. Its totient is φ = 172481148.

The previous prime is 172481143. The next prime is 172481171. The reversal of 172481149 is 941184271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151733124 + 20748025 = 12318^2 + 4555^2 .

It is an emirp because it is prime and its reverse (941184271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172481149 - 2¹⁷ = 172350077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172481143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86240574 + 86240575.

It is an arithmetic number, because the mean of its divisors is an integer number (86240575).

Almost surely, 2^172481149 is an apocalyptic number.

It is an amenable number.

172481149 is a deficient number, since it is larger than the sum of its proper divisors (1).

172481149 is an equidigital number, since it uses as much as digits as its factorization.

172481149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 37.

The square root of 172481149 is about 13133.2078716512. The cubic root of 172481149 is about 556.6478622418.

The spelling of 172481149 in words is "one hundred seventy-two million, four hundred eighty-one thousand, one hundred forty-nine".