163387394 has 4 divisors (see below), whose sum is σ = 245081094. Its totient is φ = 81693696.

The previous prime is 163387361. The next prime is 163387439. The reversal of 163387394 is 493783361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 90916225 + 72471169 = 9535^2 + 8513^2 .

It is a super-2 number, since 2×163387394² = 53390881036222472, which contains 22 as substring.

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, 40846847 + ... + 40846850.

Almost surely, 2^163387394 is an apocalyptic number.

163387394 is a deficient number, since it is larger than the sum of its proper divisors (81693700).

163387394 is an equidigital number, since it uses as much as digits as its factorization.

163387394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81693699.

The product of its digits is 326592, while the sum is 44.

The square root of 163387394 is about 12782.3078510886. The cubic root of 163387394 is about 546.6879675585.

It can be divided in two parts, 16338 and 7394, that added together give a palindrome (23732).

The spelling of 163387394 in words is "one hundred sixty-three million, three hundred eighty-seven thousand, three hundred ninety-four".