684959955 has 16 divisors (see below), whose sum is σ = 1098420480. Its totient is φ = 364483808.

The previous prime is 684959953. The next prime is 684959959. The reversal of 684959955 is 559959486.

684959955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 684959955 - 2¹ = 684959953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684959953) 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, 44895 + ... + 58184.

It is an arithmetic number, because the mean of its divisors is an integer number (68651280).

Almost surely, 2^684959955 is an apocalyptic number.

684959955 is a deficient number, since it is larger than the sum of its proper divisors (413460525).

684959955 is a wasteful number, since it uses less digits than its factorization.

684959955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103530.

The product of its digits is 17496000, while the sum is 60.

The square root of 684959955 is about 26171.7396250230. The cubic root of 684959955 is about 881.4988038493.

The spelling of 684959955 in words is "six hundred eighty-four million, nine hundred fifty-nine thousand, nine hundred fifty-five".