161894863 has 8 divisors (see below), whose sum is σ = 174466656. Its totient is φ = 149340000.

The previous prime is 161894833. The next prime is 161894867. The reversal of 161894863 is 368498161.

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

It is a cyclic number.

It is not a de Polignac number, because 161894863 - 2²⁵ = 128340431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161894867) 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, 21438 + ... + 27988.

It is an arithmetic number, because the mean of its divisors is an integer number (21808332).

Almost surely, 2^161894863 is an apocalyptic number.

161894863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

161894863 is a deficient number, since it is larger than the sum of its proper divisors (12571793).

161894863 is a wasteful number, since it uses less digits than its factorization.

161894863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8465.

The product of its digits is 248832, while the sum is 46.

The square root of 161894863 is about 12723.7912196012. The cubic root of 161894863 is about 545.0182223237.

The spelling of 161894863 in words is "one hundred sixty-one million, eight hundred ninety-four thousand, eight hundred sixty-three".