171920459 has 8 divisors (see below), whose sum is σ = 174842688. Its totient is φ = 169008840.

The previous prime is 171920449. The next prime is 171920467. The reversal of 171920459 is 954029171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 171920459 - 2¹² = 171916363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171920449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34304 + ... + 38994.

It is an arithmetic number, because the mean of its divisors is an integer number (21855336).

Almost surely, 2^171920459 is an apocalyptic number.

171920459 is a deficient number, since it is larger than the sum of its proper divisors (2922229).

171920459 is an equidigital number, since it uses as much as digits as its factorization.

171920459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 171920459 is about 13111.8442257373. The cubic root of 171920459 is about 556.0440364600.

The spelling of 171920459 in words is "one hundred seventy-one million, nine hundred twenty thousand, four hundred fifty-nine".