163748939 has 4 divisors (see below), whose sum is σ = 168174624. Its totient is φ = 159323256.

The previous prime is 163748929. The next prime is 163748951. The reversal of 163748939 is 939847361.

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

It is a cyclic number.

It is not a de Polignac number, because 163748939 - 2²⁴ = 146971723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163748929) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2212787 + ... + 2212860.

It is an arithmetic number, because the mean of its divisors is an integer number (42043656).

Almost surely, 2^163748939 is an apocalyptic number.

163748939 is a deficient number, since it is larger than the sum of its proper divisors (4425685).

163748939 is an equidigital number, since it uses as much as digits as its factorization.

163748939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4425684.

The product of its digits is 979776, while the sum is 50.

The square root of 163748939 is about 12796.4424353021. The cubic root of 163748939 is about 547.0909090717.

The spelling of 163748939 in words is "one hundred sixty-three million, seven hundred forty-eight thousand, nine hundred thirty-nine".