684742113 has 64 divisors (see below), whose sum is σ = 1157068800. Its totient is φ = 396406080.

The previous prime is 684742111. The next prime is 684742129. The reversal of 684742113 is 311247486.

It is not a de Polignac number, because 684742113 - 2¹ = 684742111 is a prime.

It is a super-2 number, since 2×684742113² = 937743522631409538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (684742111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 921220 + ... + 921962.

It is an arithmetic number, because the mean of its divisors is an integer number (18079200).

Almost surely, 2^684742113 is an apocalyptic number.

It is an amenable number.

684742113 is a deficient number, since it is larger than the sum of its proper divisors (472326687).

684742113 is a wasteful number, since it uses less digits than its factorization.

684742113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 893 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 684742113 is about 26167.5775149325. The cubic root of 684742113 is about 881.4053444571.

Adding to 684742113 its reverse (311247486), we get a palindrome (995989599).

The spelling of 684742113 in words is "six hundred eighty-four million, seven hundred forty-two thousand, one hundred thirteen".