172440343 has 2 divisors, whose sum is σ = 172440344. Its totient is φ = 172440342.

The previous prime is 172440341. The next prime is 172440353. The reversal of 172440343 is 343044271.

It is a weak prime.

It is an emirp because it is prime and its reverse (343044271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172440343 - 2¹ = 172440341 is a prime.

Together with 172440341, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172440341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86220171 + 86220172.

It is an arithmetic number, because the mean of its divisors is an integer number (86220172).

Almost surely, 2^172440343 is an apocalyptic number.

172440343 is a deficient number, since it is larger than the sum of its proper divisors (1).

172440343 is an equidigital number, since it uses as much as digits as its factorization.

172440343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 172440343 is about 13131.6542369954. The cubic root of 172440343 is about 556.6039610883.

The spelling of 172440343 in words is "one hundred seventy-two million, four hundred forty thousand, three hundred forty-three".