163868434 has 12 divisors (see below), whose sum is σ = 247274586. Its totient is φ = 81444992.

The previous prime is 163868401. The next prime is 163868479. The reversal of 163868434 is 434868361.

It can be written as a sum of positive squares in 3 ways, for example, as 134676025 + 29192409 = 11605^2 + 5403^2 .

It is a super-2 number, since 2×163868434² = 53705727323224712, which contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 276042 + ... + 276634.

Almost surely, 2^163868434 is an apocalyptic number.

163868434 is a deficient number, since it is larger than the sum of its proper divisors (83406152).

163868434 is an frugal number, since it uses more digits than its factorization.

163868434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421 (or 828 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The square root of 163868434 is about 12801.1106549393. The cubic root of 163868434 is about 547.2239556993.

The spelling of 163868434 in words is "one hundred sixty-three million, eight hundred sixty-eight thousand, four hundred thirty-four".