161473289 has 2 divisors, whose sum is σ = 161473290. Its totient is φ = 161473288.

The previous prime is 161473231. The next prime is 161473313. The reversal of 161473289 is 982374161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118439689 + 43033600 = 10883^2 + 6560^2 .

It is a cyclic number.

It is not a de Polignac number, because 161473289 - 2²⁴ = 144696073 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (161473589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80736644 + 80736645.

It is an arithmetic number, because the mean of its divisors is an integer number (80736645).

Almost surely, 2^161473289 is an apocalyptic number.

It is an amenable number.

161473289 is a deficient number, since it is larger than the sum of its proper divisors (1).

161473289 is an equidigital number, since it uses as much as digits as its factorization.

161473289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 161473289 is about 12707.2140534422. The cubic root of 161473289 is about 544.5447355328.

The spelling of 161473289 in words is "one hundred sixty-one million, four hundred seventy-three thousand, two hundred eighty-nine".