8487409 has 4 divisors (see below), whose sum is σ = 9699904. Its totient is φ = 7274916.

The previous prime is 8487389. The next prime is 8487419. The reversal of 8487409 is 9047848.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8487409 - 2⁵ = 8487377 is a prime.

It is a super-2 number, since 2×8487409² = 144072223066562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8487419) 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, 606237 + ... + 606250.

It is an arithmetic number, because the mean of its divisors is an integer number (2424976).

Almost surely, 2^8487409 is an apocalyptic number.

It is an amenable number.

8487409 is a deficient number, since it is larger than the sum of its proper divisors (1212495).

8487409 is a wasteful number, since it uses less digits than its factorization.

8487409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212494.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 8487409 is about 2913.3158084904. The cubic root of 8487409 is about 203.9819364372.

The spelling of 8487409 in words is "eight million, four hundred eighty-seven thousand, four hundred nine".