163432403 has 4 divisors (see below), whose sum is σ = 168704448. Its totient is φ = 158160360.

The previous prime is 163432387. The next prime is 163432417. The reversal of 163432403 is 304234361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 163432403 - 2⁴ = 163432387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163432103) 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, 2635976 + ... + 2636037.

It is an arithmetic number, because the mean of its divisors is an integer number (42176112).

Almost surely, 2^163432403 is an apocalyptic number.

163432403 is a deficient number, since it is larger than the sum of its proper divisors (5272045).

163432403 is an equidigital number, since it uses as much as digits as its factorization.

163432403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5272044.

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

The square root of 163432403 is about 12784.0683274144. The cubic root of 163432403 is about 546.7381624135.

Adding to 163432403 its reverse (304234361), we get a palindrome (467666764).

The spelling of 163432403 in words is "one hundred sixty-three million, four hundred thirty-two thousand, four hundred three".