163508423 has 8 divisors (see below), whose sum is σ = 178208688. Its totient is φ = 149111424.

The previous prime is 163508419. The next prime is 163508437. The reversal of 163508423 is 324805361.

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 163508423 - 2² = 163508419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163508423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163508413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74690 + ... + 76847.

It is an arithmetic number, because the mean of its divisors is an integer number (22276086).

Almost surely, 2^163508423 is an apocalyptic number.

163508423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

163508423 is a deficient number, since it is larger than the sum of its proper divisors (14700265).

163508423 is a wasteful number, since it uses less digits than its factorization.

163508423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151633.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 163508423 is about 12787.0412136663. The cubic root of 163508423 is about 546.8229203761.

The spelling of 163508423 in words is "one hundred sixty-three million, five hundred eight thousand, four hundred twenty-three".