684232358531 has 4 divisors (see below), whose sum is σ = 684234301464. Its totient is φ = 684230415600.

The previous prime is 684232358527. The next prime is 684232358561. The reversal of 684232358531 is 135853232486.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 684232358531 - 2² = 684232358527 is a prime.

It is a super-2 number, since 2×684232358531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 684232358531.

It is not an unprimeable number, because it can be changed into a prime (684232358501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278405 + ... + 1202486.

It is an arithmetic number, because the mean of its divisors is an integer number (171058575366).

Almost surely, 2^684232358531 is an apocalyptic number.

684232358531 is a deficient number, since it is larger than the sum of its proper divisors (1942933).

684232358531 is a wasteful number, since it uses less digits than its factorization.

684232358531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942932.

The product of its digits is 4147200, while the sum is 50.

The spelling of 684232358531 in words is "six hundred eighty-four billion, two hundred thirty-two million, three hundred fifty-eight thousand, five hundred thirty-one".