163988939 has 8 divisors (see below), whose sum is σ = 169830000. Its totient is φ = 158160352.

The previous prime is 163988933. The next prime is 163988947. The reversal of 163988939 is 939889361.

163988939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163988939 - 2⁸ = 163988683 is a prime.

It is a super-2 number, since 2×163988939² = 53784744228691442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163988933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29612 + ... + 34710.

It is an arithmetic number, because the mean of its divisors is an integer number (21228750).

Almost surely, 2^163988939 is an apocalyptic number.

163988939 is a deficient number, since it is larger than the sum of its proper divisors (5841061).

163988939 is a wasteful number, since it uses less digits than its factorization.

163988939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6237.

The product of its digits is 2519424, while the sum is 56.

The square root of 163988939 is about 12805.8166080887. The cubic root of 163988939 is about 547.3580613828.

The spelling of 163988939 in words is "one hundred sixty-three million, nine hundred eighty-eight thousand, nine hundred thirty-nine".