684052239 has 16 divisors (see below), whose sum is σ = 1040008032. Its totient is φ = 396192768.

The previous prime is 684052211. The next prime is 684052249. The reversal of 684052239 is 932250486.

It is a happy number.

It is not a de Polignac number, because 684052239 - 2¹⁶ = 683986703 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 684052197 and 684052206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684052249) 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, 515214 + ... + 516539.

It is an arithmetic number, because the mean of its divisors is an integer number (65000502).

Almost surely, 2^684052239 is an apocalyptic number.

684052239 is a deficient number, since it is larger than the sum of its proper divisors (355955793).

684052239 is a wasteful number, since it uses less digits than its factorization.

684052239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031786.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 684052239 is about 26154.3923462198. The cubic root of 684052239 is about 881.1092412777.

The spelling of 684052239 in words is "six hundred eighty-four million, fifty-two thousand, two hundred thirty-nine".