163004405 has 8 divisors (see below), whose sum is σ = 197542584. Its totient is φ = 129112000.

The previous prime is 163004399. The next prime is 163004407. The reversal of 163004405 is 504400361.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24542116 + 138462289 = 4954^2 + 11767^2 .

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

It is not a de Polignac number, because 163004405 - 2⁶ = 163004341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163004407) 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, 160886 + ... + 161895.

It is an arithmetic number, because the mean of its divisors is an integer number (24692823).

Almost surely, 2^163004405 is an apocalyptic number.

It is an amenable number.

163004405 is a deficient number, since it is larger than the sum of its proper divisors (34538179).

163004405 is a wasteful number, since it uses less digits than its factorization.

163004405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322887.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 163004405 is about 12767.3178467523. The cubic root of 163004405 is about 546.2604778522.

Adding to 163004405 its reverse (504400361), we get a palindrome (667404766).

The spelling of 163004405 in words is "one hundred sixty-three million, four thousand, four hundred five".