684711371 has 4 divisors (see below), whose sum is σ = 685248000. Its totient is φ = 684174744.

The previous prime is 684711367. The next prime is 684711389. The reversal of 684711371 is 173117486.

It is a happy number.

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 684711371 - 2² = 684711367 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684711301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266396 + ... + 268953.

It is an arithmetic number, because the mean of its divisors is an integer number (171312000).

Almost surely, 2^684711371 is an apocalyptic number.

684711371 is a deficient number, since it is larger than the sum of its proper divisors (536629).

684711371 is a wasteful number, since it uses less digits than its factorization.

684711371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536628.

The product of its digits is 28224, while the sum is 38.

The square root of 684711371 is about 26166.9901020350. The cubic root of 684711371 is about 881.3921538130.

The spelling of 684711371 in words is "six hundred eighty-four million, seven hundred eleven thousand, three hundred seventy-one".