171393923 has 2 divisors, whose sum is σ = 171393924. Its totient is φ = 171393922.

The previous prime is 171393883. The next prime is 171393967. The reversal of 171393923 is 329393171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171393923 - 2¹⁰ = 171392899 is a prime.

It is not a weakly prime, because it can be changed into another prime (171393023) 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, 85696961 + 85696962.

It is an arithmetic number, because the mean of its divisors is an integer number (85696962).

Almost surely, 2^171393923 is an apocalyptic number.

171393923 is a deficient number, since it is larger than the sum of its proper divisors (1).

171393923 is an equidigital number, since it uses as much as digits as its factorization.

171393923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 38.

The square root of 171393923 is about 13091.7501885730. The cubic root of 171393923 is about 555.4757957600.

The spelling of 171393923 in words is "one hundred seventy-one million, three hundred ninety-three thousand, nine hundred twenty-three".