163989590 has 8 divisors (see below), whose sum is σ = 295181280. Its totient is φ = 65595832.

The previous prime is 163989583. The next prime is 163989593. The reversal of 163989590 is 95989361.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163989593) 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, 8199470 + ... + 8199489.

It is an arithmetic number, because the mean of its divisors is an integer number (36897660).

Almost surely, 2^163989590 is an apocalyptic number.

163989590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163989590 is a deficient number, since it is larger than the sum of its proper divisors (131191690).

163989590 is a wasteful number, since it uses less digits than its factorization.

163989590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16398966.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 163989590 is about 12805.8420262004. The cubic root of 163989590 is about 547.3587856788.

The spelling of 163989590 in words is "one hundred sixty-three million, nine hundred eighty-nine thousand, five hundred ninety".