684377 has 4 divisors (see below), whose sum is σ = 693120. Its totient is φ = 675636.

The previous prime is 684373. The next prime is 684379. The reversal of 684377 is 773486.

684377 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 684377 - 2² = 684373 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684373) 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, 4253 + ... + 4410.

It is an arithmetic number, because the mean of its divisors is an integer number (173280).

2⁶⁸⁴³⁷⁷ is an apocalyptic number.

It is an amenable number.

684377 is a deficient number, since it is larger than the sum of its proper divisors (8743).

684377 is an equidigital number, since it uses as much as digits as its factorization.

684377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8742.

The product of its digits is 28224, while the sum is 35.

The square root of 684377 is about 827.2708141836. The cubic root of 684377 is about 88.1248657845.

The spelling of 684377 in words is "six hundred eighty-four thousand, three hundred seventy-seven".