684069225 has 48 divisors (see below), whose sum is σ = 1298583552. Its totient is φ = 311261760.

The previous prime is 684069181. The next prime is 684069227. The reversal of 684069225 is 522960486.

It is not a de Polignac number, because 684069225 - 2⁷ = 684069097 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (684069227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114154 + ... + 119996.

It is an arithmetic number, because the mean of its divisors is an integer number (27053824).

Almost surely, 2^684069225 is an apocalyptic number.

It is an amenable number.

684069225 is a deficient number, since it is larger than the sum of its proper divisors (614514327).

684069225 is a wasteful number, since it uses less digits than its factorization.

684069225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6086 (or 6081 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 684069225 is about 26154.7170697754. The cubic root of 684069225 is about 881.1165342868.

The spelling of 684069225 in words is "six hundred eighty-four million, sixty-nine thousand, two hundred twenty-five".