684343307 has 2 divisors, whose sum is σ = 684343308. Its totient is φ = 684343306.

The previous prime is 684343243. The next prime is 684343343. The reversal of 684343307 is 703343486.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 684343307 - 2⁶ = 684343243 is a prime.

It is not a weakly prime, because it can be changed into another prime (684343397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342171653 + 342171654.

It is an arithmetic number, because the mean of its divisors is an integer number (342171654).

Almost surely, 2^684343307 is an apocalyptic number.

684343307 is a deficient number, since it is larger than the sum of its proper divisors (1).

684343307 is an equidigital number, since it uses as much as digits as its factorization.

684343307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 684343307 is about 26159.9561735107. The cubic root of 684343307 is about 881.2341958368.

The spelling of 684343307 in words is "six hundred eighty-four million, three hundred forty-three thousand, three hundred seven".