99403 has 4 divisors (see below), whose sum is σ = 100440. Its totient is φ = 98368.

The previous prime is 99401. The next prime is 99409. The reversal of 99403 is 30499.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 30499 = 7 ⋅4357.

It is a cyclic number.

It is not a de Polignac number, because 99403 - 2¹ = 99401 is a prime.

It is a Duffinian number.

99403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (99401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358 + ... + 571.

It is an arithmetic number, because the mean of its divisors is an integer number (25110).

2⁹⁹⁴⁰³ is an apocalyptic number.

99403 is a deficient number, since it is larger than the sum of its proper divisors (1037).

99403 is a wasteful number, since it uses less digits than its factorization.

99403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 99403 is about 315.2824130839. The cubic root of 99403 is about 46.3233362947.

The spelling of 99403 in words is "ninety-nine thousand, four hundred three".