8409231 has 8 divisors (see below), whose sum is σ = 12458160. Its totient is φ = 5606136.

The previous prime is 8409227. The next prime is 8409239. The reversal of 8409231 is 1329048.

It is not a de Polignac number, because 8409231 - 2² = 8409227 is a prime.

It is a super-2 number, since 2×8409231² = 141430332022722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 311453 = 8409231 / (8 + 4 + 0 + 9 + 2 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 8409195 and 8409204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8409239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155700 + ... + 155753.

It is an arithmetic number, because the mean of its divisors is an integer number (1557270).

Almost surely, 2^8409231 is an apocalyptic number.

8409231 is a deficient number, since it is larger than the sum of its proper divisors (4048929).

8409231 is a wasteful number, since it uses less digits than its factorization.

8409231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311462 (or 311456 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 8409231 is about 2899.8674107621. The cubic root of 8409231 is about 203.3537072361.

The spelling of 8409231 in words is "eight million, four hundred nine thousand, two hundred thirty-one".