8172403 has 4 divisors (see below), whose sum is σ = 8454240. Its totient is φ = 7890568.

The previous prime is 8172391. The next prime is 8172419. The reversal of 8172403 is 3042718.

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 8172403 - 2⁵ = 8172371 is a prime.

It is a Duffinian number.

8172403 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8172443) 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, 140875 + ... + 140932.

It is an arithmetic number, because the mean of its divisors is an integer number (2113560).

Almost surely, 2^8172403 is an apocalyptic number.

8172403 is a deficient number, since it is larger than the sum of its proper divisors (281837).

8172403 is a wasteful number, since it uses less digits than its factorization.

8172403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281836.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 8172403 is about 2858.7415063276. The cubic root of 8172403 is about 201.4264930648.

The spelling of 8172403 in words is "eight million, one hundred seventy-two thousand, four hundred three".