163423403 has 8 divisors (see below), whose sum is σ = 191994096. Its totient is φ = 137138400.

The previous prime is 163423399. The next prime is 163423409. The reversal of 163423403 is 304324361.

It is a happy number.

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 163423403 - 2² = 163423399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163423409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 571268 + ... + 571553.

It is an arithmetic number, because the mean of its divisors is an integer number (23999262).

Almost surely, 2^163423403 is an apocalyptic number.

163423403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

163423403 is a deficient number, since it is larger than the sum of its proper divisors (28570693).

163423403 is a wasteful number, since it uses less digits than its factorization.

163423403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142845.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 163423403 is about 12783.7163219464. The cubic root of 163423403 is about 546.7281261871.

Adding to 163423403 its reverse (304324361), we get a palindrome (467747764).

The spelling of 163423403 in words is "one hundred sixty-three million, four hundred twenty-three thousand, four hundred three".