163903931 has 8 divisors (see below), whose sum is σ = 167263920. Its totient is φ = 160553952.

The previous prime is 163903921. The next prime is 163903933. The reversal of 163903931 is 139309361.

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 163903931 - 2¹⁴ = 163887547 is a prime.

It is a super-2 number, since 2×163903931² = 53728997194505522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163903891 and 163903900.

It is not an unprimeable number, because it can be changed into a prime (163903933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36740 + ... + 40958.

It is an arithmetic number, because the mean of its divisors is an integer number (20907990).

Almost surely, 2^163903931 is an apocalyptic number.

163903931 is a deficient number, since it is larger than the sum of its proper divisors (3359989).

163903931 is an equidigital number, since it uses as much as digits as its factorization.

163903931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005.

The product of its (nonzero) digits is 13122, while the sum is 35.

The square root of 163903931 is about 12802.4970611205. The cubic root of 163903931 is about 547.2634658638.

The spelling of 163903931 in words is "one hundred sixty-three million, nine hundred three thousand, nine hundred thirty-one".