173431 has 2 divisors, whose sum is σ = 173432. Its totient is φ = 173430.

The previous prime is 173429. The next prime is 173473. The reversal of 173431 is 134371.

It is a weak prime.

It is an emirp because it is prime and its reverse (134371) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 173431 - 2¹ = 173429 is a prime.

It is a super-2 number, since 2×173431² = 60156623522, which contains 22 as substring.

Together with 173429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 173399 and 173408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173491) 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, 86715 + 86716.

It is an arithmetic number, because the mean of its divisors is an integer number (86716).

2¹⁷³⁴³¹ is an apocalyptic number.

173431 is a deficient number, since it is larger than the sum of its proper divisors (1).

173431 is an equidigital number, since it uses as much as digits as its factorization.

173431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 19.

The square root of 173431 is about 416.4504772479. The cubic root of 173431 is about 55.7667809284.

Subtracting from 173431 its reverse (134371), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 173431 in words is "one hundred seventy-three thousand, four hundred thirty-one".