684951263 has 2 divisors, whose sum is σ = 684951264. Its totient is φ = 684951262.

The previous prime is 684951229. The next prime is 684951299. The reversal of 684951263 is 362159486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684951263 - 2²⁸ = 416515807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684953263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342475631 + 342475632.

It is an arithmetic number, because the mean of its divisors is an integer number (342475632).

Almost surely, 2^684951263 is an apocalyptic number.

684951263 is a deficient number, since it is larger than the sum of its proper divisors (1).

684951263 is an equidigital number, since it uses as much as digits as its factorization.

684951263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 44.

The square root of 684951263 is about 26171.5735675179. The cubic root of 684951263 is about 881.4950751545.

The spelling of 684951263 in words is "six hundred eighty-four million, nine hundred fifty-one thousand, two hundred sixty-three".