876409 has 8 divisors (see below), whose sum is σ = 927360. Its totient is φ = 826896.

The previous prime is 876373. The next prime is 876431. The reversal of 876409 is 904678.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 876409 - 2¹⁷ = 745337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (876479) 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, 1042 + ... + 1684.

It is an arithmetic number, because the mean of its divisors is an integer number (115920).

2⁸⁷⁶⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

876409 is a deficient number, since it is larger than the sum of its proper divisors (50951).

876409 is a wasteful number, since it uses less digits than its factorization.

876409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 876409 is about 936.1671859235. The cubic root of 876409 is about 95.6978710355.

The spelling of 876409 in words is "eight hundred seventy-six thousand, four hundred nine".