163303421 has 4 divisors (see below), whose sum is σ = 164550144. Its totient is φ = 162056700.

The previous prime is 163303403. The next prime is 163303429. The reversal of 163303421 is 124303361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 163303421 - 2²² = 159109117 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 (163303429) 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, 623165 + ... + 623426.

It is an arithmetic number, because the mean of its divisors is an integer number (41137536).

Almost surely, 2^163303421 is an apocalyptic number.

It is an amenable number.

163303421 is a deficient number, since it is larger than the sum of its proper divisors (1246723).

163303421 is a wasteful number, since it uses less digits than its factorization.

163303421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246722.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 163303421 is about 12779.0226934613. The cubic root of 163303421 is about 546.5942946942.

Adding to 163303421 its reverse (124303361), we get a palindrome (287606782).

The spelling of 163303421 in words is "one hundred sixty-three million, three hundred three thousand, four hundred twenty-one".