684131653 has 16 divisors (see below), whose sum is σ = 720604672. Its totient is φ = 648648000.

The previous prime is 684131639. The next prime is 684131683. The reversal of 684131653 is 356131486.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684131653 is a prime.

It is a super-2 number, since 2×684131653² = 936072237273024818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684131683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 625375 + ... + 626467.

It is an arithmetic number, because the mean of its divisors is an integer number (45037792).

Almost surely, 2^684131653 is an apocalyptic number.

It is an amenable number.

684131653 is a deficient number, since it is larger than the sum of its proper divisors (36473019).

684131653 is a wasteful number, since it uses less digits than its factorization.

684131653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516.

The product of its digits is 51840, while the sum is 37.

The square root of 684131653 is about 26155.9104792779. The cubic root of 684131653 is about 881.1433369689.

The spelling of 684131653 in words is "six hundred eighty-four million, one hundred thirty-one thousand, six hundred fifty-three".