161330473 has 2 divisors, whose sum is σ = 161330474. Its totient is φ = 161330472.

The previous prime is 161330443. The next prime is 161330483. The reversal of 161330473 is 374033161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99440784 + 61889689 = 9972^2 + 7867^2 .

It is a cyclic number.

It is not a de Polignac number, because 161330473 - 2²⁵ = 127776041 is a prime.

It is not a weakly prime, because it can be changed into another prime (161330423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80665236 + 80665237.

It is an arithmetic number, because the mean of its divisors is an integer number (80665237).

Almost surely, 2^161330473 is an apocalyptic number.

It is an amenable number.

161330473 is a deficient number, since it is larger than the sum of its proper divisors (1).

161330473 is an equidigital number, since it uses as much as digits as its factorization.

161330473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 161330473 is about 12701.5933252486. The cubic root of 161330473 is about 544.3841462476.

The spelling of 161330473 in words is "one hundred sixty-one million, three hundred thirty thousand, four hundred seventy-three".