684679963 has 8 divisors (see below), whose sum is σ = 747316080. Its totient is φ = 622109280.

The previous prime is 684679949. The next prime is 684679967. The reversal of 684679963 is 369976486.

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

It is a cyclic number.

It is not a de Polignac number, because 684679963 - 2²¹ = 682582811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 684679898 and 684679907.

It is not an unprimeable number, because it can be changed into a prime (684679967) 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, 6981 + ... + 37657.

It is an arithmetic number, because the mean of its divisors is an integer number (93414510).

Almost surely, 2^684679963 is an apocalyptic number.

684679963 is a deficient number, since it is larger than the sum of its proper divisors (62636117).

684679963 is a wasteful number, since it uses less digits than its factorization.

684679963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32717.

The product of its digits is 11757312, while the sum is 58.

The square root of 684679963 is about 26166.3899497046. The cubic root of 684679963 is about 881.3786769967.

The spelling of 684679963 in words is "six hundred eighty-four million, six hundred seventy-nine thousand, nine hundred sixty-three".