173426861 has 2 divisors, whose sum is σ = 173426862. Its totient is φ = 173426860.

The previous prime is 173426849. The next prime is 173426867. The reversal of 173426861 is 168624371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171452836 + 1974025 = 13094^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 173426861 - 2¹⁴ = 173410477 is a prime.

It is a super-2 number, since 2×173426861² = 60153752232626642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173426867) 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, 86713430 + 86713431.

It is an arithmetic number, because the mean of its divisors is an integer number (86713431).

Almost surely, 2^173426861 is an apocalyptic number.

It is an amenable number.

173426861 is a deficient number, since it is larger than the sum of its proper divisors (1).

173426861 is an equidigital number, since it uses as much as digits as its factorization.

173426861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 173426861 is about 13169.1632611947. The cubic root of 173426861 is about 557.6633729270.

The spelling of 173426861 in words is "one hundred seventy-three million, four hundred twenty-six thousand, eight hundred sixty-one".