8472239 has 4 divisors (see below), whose sum is σ = 8970624. Its totient is φ = 7973856.

The previous prime is 8472221. The next prime is 8472259. The reversal of 8472239 is 9322748.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8472239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8472199 and 8472208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8472259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249167 + ... + 249200.

It is an arithmetic number, because the mean of its divisors is an integer number (2242656).

Almost surely, 2^8472239 is an apocalyptic number.

8472239 is a deficient number, since it is larger than the sum of its proper divisors (498385).

8472239 is a wasteful number, since it uses less digits than its factorization.

8472239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498384.

The product of its digits is 24192, while the sum is 35.

The square root of 8472239 is about 2910.7110815057. The cubic root of 8472239 is about 203.8603346854.

The spelling of 8472239 in words is "eight million, four hundred seventy-two thousand, two hundred thirty-nine".