684022331 has 4 divisors (see below), whose sum is σ = 684162600. Its totient is φ = 683882064.

The previous prime is 684022327. The next prime is 684022351. The reversal of 684022331 is 133220486.

684022331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 684022331 - 2² = 684022327 is a prime.

It is a super-2 number, since 2×684022331² = 935773098613347122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 684022294 and 684022303.

It is not an unprimeable number, because it can be changed into a prime (684022321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62546 + ... + 72663.

It is an arithmetic number, because the mean of its divisors is an integer number (171040650).

Almost surely, 2^684022331 is an apocalyptic number.

684022331 is a deficient number, since it is larger than the sum of its proper divisors (140269).

684022331 is a wasteful number, since it uses less digits than its factorization.

684022331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140268.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 684022331 is about 26153.8205813223. The cubic root of 684022331 is about 881.0963998611.

The spelling of 684022331 in words is "six hundred eighty-four million, twenty-two thousand, three hundred thirty-one".