684928923 has 32 divisors (see below), whose sum is σ = 1065265152. Its totient is φ = 383356800.

The previous prime is 684928921. The next prime is 684928927. The reversal of 684928923 is 329829486.

It is not a de Polignac number, because 684928923 - 2¹ = 684928921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684928921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346165 + ... + 348137.

It is an arithmetic number, because the mean of its divisors is an integer number (33289536).

Almost surely, 2^684928923 is an apocalyptic number.

684928923 is a deficient number, since it is larger than the sum of its proper divisors (380336229).

684928923 is a wasteful number, since it uses less digits than its factorization.

684928923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315.

The product of its digits is 1492992, while the sum is 51.

The square root of 684928923 is about 26171.1467650923. The cubic root of 684928923 is about 881.4854915947.

The spelling of 684928923 in words is "six hundred eighty-four million, nine hundred twenty-eight thousand, nine hundred twenty-three".