684761331 has 8 divisors (see below), whose sum is σ = 937691344. Its totient is φ = 444169440.

The previous prime is 684761327. The next prime is 684761353. The reversal of 684761331 is 133167486.

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

It is not a de Polignac number, because 684761331 - 2² = 684761327 is a prime.

It is a super-2 number, since 2×684761331² = 937796160865783122, which 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 684761331.

It is not an unprimeable number, because it can be changed into a prime (684761321) 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 7 ways as a sum of consecutive naturals, for example, 3084400 + ... + 3084621.

It is an arithmetic number, because the mean of its divisors is an integer number (117211418).

Almost surely, 2^684761331 is an apocalyptic number.

684761331 is a deficient number, since it is larger than the sum of its proper divisors (252930013).

684761331 is a wasteful number, since it uses less digits than its factorization.

684761331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6169061.

The product of its digits is 72576, while the sum is 39.

The square root of 684761331 is about 26167.9447225035. The cubic root of 684761331 is about 881.4135902327.

The spelling of 684761331 in words is "six hundred eighty-four million, seven hundred sixty-one thousand, three hundred thirty-one".