161573289 has 8 divisors (see below), whose sum is σ = 215491680. Its totient is φ = 107685216.

The previous prime is 161573273. The next prime is 161573299. The reversal of 161573289 is 982375161.

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

It is not a de Polignac number, because 161573289 - 2⁴ = 161573273 is a prime.

It is a super-2 number, since 2×161573289² = 52211855436555042, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161573289.

It is not an unprimeable number, because it can be changed into a prime (161573299) 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 in 7 ways as a sum of consecutive naturals, for example, 12334 + ... + 21800.

It is an arithmetic number, because the mean of its divisors is an integer number (26936460).

Almost surely, 2^161573289 is an apocalyptic number.

It is an amenable number.

161573289 is a deficient number, since it is larger than the sum of its proper divisors (53918391).

161573289 is an equidigital number, since it uses as much as digits as its factorization.

161573289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15159.

The product of its digits is 90720, while the sum is 42.

The square root of 161573289 is about 12711.1482172147. The cubic root of 161573289 is about 544.6571240617.

The spelling of 161573289 in words is "one hundred sixty-one million, five hundred seventy-three thousand, two hundred eighty-nine".