173242981 has 2 divisors, whose sum is σ = 173242982. Its totient is φ = 173242980.

The previous prime is 173242919. The next prime is 173243017. The reversal of 173242981 is 189242371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168220900 + 5022081 = 12970^2 + 2241^2 .

It is a cyclic number.

It is not a de Polignac number, because 173242981 - 2⁹ = 173242469 is a prime.

It is a super-2 number, since 2×173242981² = 60026260931532722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 173242981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173248981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86621490 + 86621491.

It is an arithmetic number, because the mean of its divisors is an integer number (86621491).

Almost surely, 2^173242981 is an apocalyptic number.

It is an amenable number.

173242981 is a deficient number, since it is larger than the sum of its proper divisors (1).

173242981 is an equidigital number, since it uses as much as digits as its factorization.

173242981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 173242981 is about 13162.1799486255. The cubic root of 173242981 is about 557.4662112281.

The spelling of 173242981 in words is "one hundred seventy-three million, two hundred forty-two thousand, nine hundred eighty-one".