161893653 has 8 divisors (see below), whose sum is σ = 215917248. Its totient is φ = 107899584.

The previous prime is 161893651. The next prime is 161893657. The reversal of 161893653 is 356398161.

It is a happy number.

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

It is not a de Polignac number, because 161893653 - 2¹ = 161893651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161893651) 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, 15976 + ... + 24062.

It is an arithmetic number, because the mean of its divisors is an integer number (26989656).

Almost surely, 2^161893653 is an apocalyptic number.

It is an amenable number.

161893653 is a deficient number, since it is larger than the sum of its proper divisors (54023595).

161893653 is an equidigital number, since it uses as much as digits as its factorization.

161893653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14763.

The product of its digits is 116640, while the sum is 42.

The square root of 161893653 is about 12723.7436707912. The cubic root of 161893653 is about 545.0168645007.

The spelling of 161893653 in words is "one hundred sixty-one million, eight hundred ninety-three thousand, six hundred fifty-three".