163801403 has 4 divisors (see below), whose sum is σ = 163986960. Its totient is φ = 163615848.

The previous prime is 163801387. The next prime is 163801453. The reversal of 163801403 is 304108361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304108361 = 59 ⋅5154379.

It is a cyclic number.

It is not a de Polignac number, because 163801403 - 2⁴ = 163801387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163801453) 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, 91448 + ... + 93221.

It is an arithmetic number, because the mean of its divisors is an integer number (40996740).

Almost surely, 2^163801403 is an apocalyptic number.

163801403 is a deficient number, since it is larger than the sum of its proper divisors (185557).

163801403 is an equidigital number, since it uses as much as digits as its factorization.

163801403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185556.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 163801403 is about 12798.4922158823. The cubic root of 163801403 is about 547.1493308500.

Adding to 163801403 its reverse (304108361), we get a palindrome (467909764).

The spelling of 163801403 in words is "one hundred sixty-three million, eight hundred one thousand, four hundred three".