163990233 has 48 divisors (see below), whose sum is σ = 265052736. Its totient is φ = 96875520.

The previous prime is 163990223. The next prime is 163990241. The reversal of 163990233 is 332099361.

It is a happy number.

163990233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 163990233 - 2¹⁷ = 163859161 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163990213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1196941 + ... + 1197077.

It is an arithmetic number, because the mean of its divisors is an integer number (5521932).

Almost surely, 2^163990233 is an apocalyptic number.

It is an amenable number.

163990233 is a deficient number, since it is larger than the sum of its proper divisors (101062503).

163990233 is a wasteful number, since it uses less digits than its factorization.

163990233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 163990233 is about 12805.8671319048. The cubic root of 163990233 is about 547.3595010723.

The spelling of 163990233 in words is "one hundred sixty-three million, nine hundred ninety thousand, two hundred thirty-three".