677509 has 4 divisors (see below), whose sum is σ = 774304. Its totient is φ = 580716.

The previous prime is 677473. The next prime is 677531. The reversal of 677509 is 905776.

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 a de Polignac number, because none of the positive numbers 2^k-677509 is a prime.

It is an Ulam number.

It is a Duffinian number.

677509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677539) 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, 48387 + ... + 48400.

It is an arithmetic number, because the mean of its divisors is an integer number (193576).

2⁶⁷⁷⁵⁰⁹ is an apocalyptic number.

It is an amenable number.

677509 is a deficient number, since it is larger than the sum of its proper divisors (96795).

677509 is an equidigital number, since it uses as much as digits as its factorization.

677509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96794.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 677509 is about 823.1093487502. The cubic root of 677509 is about 87.8290845818.

The spelling of 677509 in words is "six hundred seventy-seven thousand, five hundred nine".