684622239 has 16 divisors (see below), whose sum is σ = 1047836928. Its totient is φ = 389486592.

The previous prime is 684622219. The next prime is 684622241. The reversal of 684622239 is 932226486.

684622239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 684622239 - 2⁸ = 684621983 is a prime.

It is a super-2 number, since 2×684622239² = 937415220266746242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 684622239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684622219) 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, 67042 + ... + 76575.

It is an arithmetic number, because the mean of its divisors is an integer number (65489808).

Almost surely, 2^684622239 is an apocalyptic number.

684622239 is a deficient number, since it is larger than the sum of its proper divisors (363214689).

684622239 is a wasteful number, since it uses less digits than its factorization.

684622239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143854.

The product of its digits is 248832, while the sum is 42.

The square root of 684622239 is about 26165.2869084212. The cubic root of 684622239 is about 881.3539072087.

The spelling of 684622239 in words is "six hundred eighty-four million, six hundred twenty-two thousand, two hundred thirty-nine".