172867423 has 2 divisors, whose sum is σ = 172867424. Its totient is φ = 172867422.

The previous prime is 172867421. The next prime is 172867427. The reversal of 172867423 is 324768271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172867423 - 2¹ = 172867421 is a prime.

Together with 172867421, 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 (172867421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86433711 + 86433712.

It is an arithmetic number, because the mean of its divisors is an integer number (86433712).

Almost surely, 2^172867423 is an apocalyptic number.

172867423 is a deficient number, since it is larger than the sum of its proper divisors (1).

172867423 is an equidigital number, since it uses as much as digits as its factorization.

172867423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 172867423 is about 13147.9056507111. The cubic root of 172867423 is about 557.0630927073.

The spelling of 172867423 in words is "one hundred seventy-two million, eight hundred sixty-seven thousand, four hundred twenty-three".