677409 has 8 divisors (see below), whose sum is σ = 907200. Its totient is φ = 449616.

The previous prime is 677387. The next prime is 677423. The reversal of 677409 is 904776.

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

It is not a de Polignac number, because 677409 - 2¹² = 673313 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 677409.

It is not an unprimeable number, because it can be changed into a prime (677459) 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, 724 + ... + 1370.

It is an arithmetic number, because the mean of its divisors is an integer number (113400).

2⁶⁷⁷⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

677409 is a deficient number, since it is larger than the sum of its proper divisors (229791).

677409 is a wasteful number, since it uses less digits than its factorization.

677409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 677409 is about 823.0486012381. The cubic root of 677409 is about 87.8247631924.

The spelling of 677409 in words is "six hundred seventy-seven thousand, four hundred nine".