163988723 has 4 divisors (see below), whose sum is σ = 164014488. Its totient is φ = 163962960.

The previous prime is 163988717. The next prime is 163988761. The reversal of 163988723 is 327889361.

163988723 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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 163988723 - 2⁸ = 163988467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163988023) 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, 4343 + ... + 18623.

It is an arithmetic number, because the mean of its divisors is an integer number (41003622).

Almost surely, 2^163988723 is an apocalyptic number.

163988723 is a deficient number, since it is larger than the sum of its proper divisors (25765).

163988723 is a wasteful number, since it uses less digits than its factorization.

163988723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25764.

The product of its digits is 435456, while the sum is 47.

The square root of 163988723 is about 12805.8081744184. The cubic root of 163988723 is about 547.3578210629.

The spelling of 163988723 in words is "one hundred sixty-three million, nine hundred eighty-eight thousand, seven hundred twenty-three".