163943398 has 4 divisors (see below), whose sum is σ = 245915100. Its totient is φ = 81971698.

The previous prime is 163943389. The next prime is 163943431. The reversal of 163943398 is 893349361.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40985848 + ... + 40985851.

It is an arithmetic number, because the mean of its divisors is an integer number (61478775).

Almost surely, 2^163943398 is an apocalyptic number.

163943398 is a deficient number, since it is larger than the sum of its proper divisors (81971702).

163943398 is an equidigital number, since it uses as much as digits as its factorization.

163943398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81971701.

The product of its digits is 419904, while the sum is 46.

The square root of 163943398 is about 12804.0383473340. The cubic root of 163943398 is about 547.3073881657.

The spelling of 163943398 in words is "one hundred sixty-three million, nine hundred forty-three thousand, three hundred ninety-eight".