172344871 has 2 divisors, whose sum is σ = 172344872. Its totient is φ = 172344870.

The previous prime is 172344857. The next prime is 172344901. The reversal of 172344871 is 178443271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172344871 - 2⁷ = 172344743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172344871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172344811) 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, 86172435 + 86172436.

It is an arithmetic number, because the mean of its divisors is an integer number (86172436).

Almost surely, 2^172344871 is an apocalyptic number.

172344871 is a deficient number, since it is larger than the sum of its proper divisors (1).

172344871 is an equidigital number, since it uses as much as digits as its factorization.

172344871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 37.

The square root of 172344871 is about 13128.0185481283. The cubic root of 172344871 is about 556.5012204293.

The spelling of 172344871 in words is "one hundred seventy-two million, three hundred forty-four thousand, eight hundred seventy-one".