677405 has 8 divisors (see below), whose sum is σ = 826584. Its totient is φ = 532800.

The previous prime is 677387. The next prime is 677423. The reversal of 677405 is 504776.

677405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (677387) and next prime (677423).

It can be written as a sum of positive squares in 4 ways, for example, as 8281 + 669124 = 91^2 + 818^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-677405 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806 + ... + 1415.

It is an arithmetic number, because the mean of its divisors is an integer number (103323).

2⁶⁷⁷⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

677405 is a deficient number, since it is larger than the sum of its proper divisors (149179).

677405 is a wasteful number, since it uses less digits than its factorization.

677405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 677405 is about 823.0461712444. The cubic root of 677405 is about 87.8245903280.

The spelling of 677405 in words is "six hundred seventy-seven thousand, four hundred five".