686377 has 4 divisors (see below), whose sum is σ = 688896. Its totient is φ = 683860.

The previous prime is 686363. The next prime is 686417. The reversal of 686377 is 773686.

686377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 686377 - 2¹¹ = 684329 is a prime.

It is a super-2 number, since 2×686377² = 942226772258, which contains 22 as substring.

It is a Duffinian number.

686377 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (686317) 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, 793 + ... + 1414.

It is an arithmetic number, because the mean of its divisors is an integer number (172224).

2⁶⁸⁶³⁷⁷ is an apocalyptic number.

It is an amenable number.

686377 is a deficient number, since it is larger than the sum of its proper divisors (2519).

686377 is a wasteful number, since it uses less digits than its factorization.

686377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518.

The product of its digits is 42336, while the sum is 37.

The square root of 686377 is about 828.4787263412. The cubic root of 686377 is about 88.2106266644.

It can be divided in two parts, 68637 and 7, that added together give a square (68644 = 262²).

The spelling of 686377 in words is "six hundred eighty-six thousand, three hundred seventy-seven".