172344379 has 2 divisors, whose sum is σ = 172344380. Its totient is φ = 172344378.

The previous prime is 172344377. The next prime is 172344391. The reversal of 172344379 is 973443271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172344379 - 2¹ = 172344377 is a prime.

Together with 172344377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (172344371) 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, 86172189 + 86172190.

It is an arithmetic number, because the mean of its divisors is an integer number (86172190).

Almost surely, 2^172344379 is an apocalyptic number.

172344379 is a deficient number, since it is larger than the sum of its proper divisors (1).

172344379 is an equidigital number, since it uses as much as digits as its factorization.

172344379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 40.

The square root of 172344379 is about 13127.9998095673. Note that the first 3 decimals coincide. The cubic root of 172344379 is about 556.5006908732.

The spelling of 172344379 in words is "one hundred seventy-two million, three hundred forty-four thousand, three hundred seventy-nine".