8939409 has 16 divisors (see below), whose sum is σ = 12177984. Its totient is φ = 5832000.

The previous prime is 8939407. The next prime is 8939419. The reversal of 8939409 is 9049398.

It is not a de Polignac number, because 8939409 - 2¹ = 8939407 is a prime.

8939409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8939407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49299 + ... + 49479.

It is an arithmetic number, because the mean of its divisors is an integer number (761124).

Almost surely, 2^8939409 is an apocalyptic number.

It is an amenable number.

8939409 is a deficient number, since it is larger than the sum of its proper divisors (3238575).

8939409 is a wasteful number, since it uses less digits than its factorization.

8939409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 8939409 is about 2989.8844459276. The cubic root of 8939409 is about 207.5405369102.

The spelling of 8939409 in words is "eight million, nine hundred thirty-nine thousand, four hundred nine".