163086394 has 4 divisors (see below), whose sum is σ = 244629594. Its totient is φ = 81543196.

The previous prime is 163086377. The next prime is 163086403. The reversal of 163086394 is 493680361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493680361 = 22159 ⋅22279.

It can be written as a sum of positive squares in only one way, i.e., 159138225 + 3948169 = 12615^2 + 1987^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40771597 + ... + 40771600.

Almost surely, 2^163086394 is an apocalyptic number.

163086394 is a deficient number, since it is larger than the sum of its proper divisors (81543200).

163086394 is an equidigital number, since it uses as much as digits as its factorization.

163086394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81543199.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 163086394 is about 12770.5283367604. The cubic root of 163086394 is about 546.3520496991.

The spelling of 163086394 in words is "one hundred sixty-three million, eighty-six thousand, three hundred ninety-four".