163930399 has 4 divisors (see below), whose sum is σ = 164222136. Its totient is φ = 163638664.

The previous prime is 163930397. The next prime is 163930427. The reversal of 163930399 is 993039361.

163930399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993039361 = 67 ⋅14821483.

It is a cyclic number.

It is not a de Polignac number, because 163930399 - 2¹ = 163930397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163930391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145024 + ... + 146149.

It is an arithmetic number, because the mean of its divisors is an integer number (41055534).

Almost surely, 2^163930399 is an apocalyptic number.

163930399 is a deficient number, since it is larger than the sum of its proper divisors (291737).

163930399 is an equidigital number, since it uses as much as digits as its factorization.

163930399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291736.

The product of its (nonzero) digits is 118098, while the sum is 43.

The square root of 163930399 is about 12803.5307239839. The cubic root of 163930399 is about 547.2929225292.

The spelling of 163930399 in words is "one hundred sixty-three million, nine hundred thirty thousand, three hundred ninety-nine".