684613297 has 2 divisors, whose sum is σ = 684613298. Its totient is φ = 684613296.

The previous prime is 684613283. The next prime is 684613379. The reversal of 684613297 is 792316486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441378081 + 243235216 = 21009^2 + 15596^2 .

It is a cyclic number.

It is not a de Polignac number, because 684613297 - 2¹⁹ = 684089009 is a prime.

It is not a weakly prime, because it can be changed into another prime (684611297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342306648 + 342306649.

It is an arithmetic number, because the mean of its divisors is an integer number (342306649).

Almost surely, 2^684613297 is an apocalyptic number.

It is an amenable number.

684613297 is a deficient number, since it is larger than the sum of its proper divisors (1).

684613297 is an equidigital number, since it uses as much as digits as its factorization.

684613297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 46.

The square root of 684613297 is about 26165.1160326111. The cubic root of 684613297 is about 881.3500700070.

The spelling of 684613297 in words is "six hundred eighty-four million, six hundred thirteen thousand, two hundred ninety-seven".