684376479 has 8 divisors (see below), whose sum is σ = 1013891120. Its totient is φ = 456250968.

The previous prime is 684376453. The next prime is 684376487. The reversal of 684376479 is 974673486.

It is a happy number.

684376479 is a `hidden beast` number, since 68 + 43 + 76 + 479 = 666.

684376479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 684376479 - 2¹³ = 684368287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684376489) 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, 12673612 + ... + 12673665.

It is an arithmetic number, because the mean of its divisors is an integer number (126736390).

Almost surely, 2^684376479 is an apocalyptic number.

684376479 is a deficient number, since it is larger than the sum of its proper divisors (329514641).

684376479 is a wasteful number, since it uses less digits than its factorization.

684376479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25347286 (or 25347280 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 54.

The square root of 684376479 is about 26160.5901882966. The cubic root of 684376479 is about 881.2484342208.

The spelling of 684376479 in words is "six hundred eighty-four million, three hundred seventy-six thousand, four hundred seventy-nine".