807409 has 2 divisors, whose sum is σ = 807410. Its totient is φ = 807408.

The previous prime is 807407. The next prime is 807419. The reversal of 807409 is 904708.

807409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717409 + 90000 = 847^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 807409 - 2¹ = 807407 is a prime.

Together with 807407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (807403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403704 + 403705.

It is an arithmetic number, because the mean of its divisors is an integer number (403705).

2⁸⁰⁷⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

807409 is a deficient number, since it is larger than the sum of its proper divisors (1).

807409 is an equidigital number, since it uses as much as digits as its factorization.

807409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 807409 is about 898.5594025995. The cubic root of 807409 is about 93.1174759322.

The spelling of 807409 in words is "eight hundred seven thousand, four hundred nine".