684748231 has 2 divisors, whose sum is σ = 684748232. Its totient is φ = 684748230.

The previous prime is 684748199. The next prime is 684748271. The reversal of 684748231 is 132847486.

684748231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684748231 - 2⁵ = 684748199 is a prime.

It is a super-2 number, since 2×684748231² = 937760279715258722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684748271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342374115 + 342374116.

It is an arithmetic number, because the mean of its divisors is an integer number (342374116).

Almost surely, 2^684748231 is an apocalyptic number.

684748231 is a deficient number, since it is larger than the sum of its proper divisors (1).

684748231 is an equidigital number, since it uses as much as digits as its factorization.

684748231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 43.

The square root of 684748231 is about 26167.6944150607. The cubic root of 684748231 is about 881.4079694950.

The spelling of 684748231 in words is "six hundred eighty-four million, seven hundred forty-eight thousand, two hundred thirty-one".