161983065 has 8 divisors (see below), whose sum is σ = 259172928. Its totient is φ = 86390960.

The previous prime is 161983057. The next prime is 161983069. The reversal of 161983065 is 560389161.

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

It is not a de Polignac number, because 161983065 - 2³ = 161983057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161983069) 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, 5399421 + ... + 5399450.

It is an arithmetic number, because the mean of its divisors is an integer number (32396616).

Almost surely, 2^161983065 is an apocalyptic number.

161983065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161983065 is a deficient number, since it is larger than the sum of its proper divisors (97189863).

161983065 is a wasteful number, since it uses less digits than its factorization.

161983065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10798879.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 161983065 is about 12727.2567743407. The cubic root of 161983065 is about 545.1171815474.

The spelling of 161983065 in words is "one hundred sixty-one million, nine hundred eighty-three thousand, sixty-five".