163421923 has 8 divisors (see below), whose sum is σ = 194888448. Its totient is φ = 133985544.

The previous prime is 163421899. The next prime is 163421927. The reversal of 163421923 is 329124361.

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

It is not a de Polignac number, because 163421923 - 2⁵ = 163421891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163421927) 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, 507361 + ... + 507682.

It is an arithmetic number, because the mean of its divisors is an integer number (24361056).

Almost surely, 2^163421923 is an apocalyptic number.

163421923 is a deficient number, since it is larger than the sum of its proper divisors (31466525).

163421923 is a wasteful number, since it uses less digits than its factorization.

163421923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015073.

The product of its digits is 7776, while the sum is 31.

The square root of 163421923 is about 12783.6584356748. The cubic root of 163421923 is about 546.7264757502.

The spelling of 163421923 in words is "one hundred sixty-three million, four hundred twenty-one thousand, nine hundred twenty-three".