8072409 has 4 divisors (see below), whose sum is σ = 10763216. Its totient is φ = 5381604.

The previous prime is 8072357. The next prime is 8072417. The reversal of 8072409 is 9042708.

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 not a de Polignac number, because 8072409 - 2⁹ = 8071897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8072429) 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, 1345399 + ... + 1345404.

It is an arithmetic number, because the mean of its divisors is an integer number (2690804).

Almost surely, 2^8072409 is an apocalyptic number.

It is an amenable number.

8072409 is a deficient number, since it is larger than the sum of its proper divisors (2690807).

8072409 is a wasteful number, since it uses less digits than its factorization.

8072409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690806.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 8072409 is about 2841.1985147117. The cubic root of 8072409 is about 200.6015969246.

Subtracting 8072409 from its reverse (9042708), we obtain a cube (970299 = 99³).

The spelling of 8072409 in words is "eight million, seventy-two thousand, four hundred nine".