161970873 has 8 divisors (see below), whose sum is σ = 216574368. Its totient is φ = 107673984.

The previous prime is 161970863. The next prime is 161970881. The reversal of 161970873 is 378079161.

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

It is not a de Polignac number, because 161970873 - 2⁴ = 161970857 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (161970803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75415 + ... + 77532.

It is an arithmetic number, because the mean of its divisors is an integer number (27071796).

Almost surely, 2^161970873 is an apocalyptic number.

It is an amenable number.

161970873 is a deficient number, since it is larger than the sum of its proper divisors (54603495).

161970873 is a wasteful number, since it uses less digits than its factorization.

161970873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153303.

The product of its (nonzero) digits is 63504, while the sum is 42.

The square root of 161970873 is about 12726.7777932987. Note that the first 4 decimals coincide. The cubic root of 161970873 is about 545.1035047361.

The spelling of 161970873 in words is "one hundred sixty-one million, nine hundred seventy thousand, eight hundred seventy-three".