1685323247 has 2 divisors, whose sum is σ = 1685323248. Its totient is φ = 1685323246.

The previous prime is 1685323223. The next prime is 1685323267. The reversal of 1685323247 is 7423235861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1685323247 - 2¹² = 1685319151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1685323207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842661623 + 842661624.

It is an arithmetic number, because the mean of its divisors is an integer number (842661624).

Almost surely, 2^1685323247 is an apocalyptic number.

1685323247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685323247 is an equidigital number, since it uses as much as digits as its factorization.

1685323247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 41.

The square root of 1685323247 is about 41052.6886695622. The cubic root of 1685323247 is about 1190.0386605617.

The spelling of 1685323247 in words is "one billion, six hundred eighty-five million, three hundred twenty-three thousand, two hundred forty-seven".