1684938313 has 2 divisors, whose sum is σ = 1684938314. Its totient is φ = 1684938312.

The previous prime is 1684938293. The next prime is 1684938341. The reversal of 1684938313 is 3138394861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1684938304 + 9 = 41048^2 + 3^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1684938313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1684938383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842469156 + 842469157.

It is an arithmetic number, because the mean of its divisors is an integer number (842469157).

Almost surely, 2^1684938313 is an apocalyptic number.

It is an amenable number.

1684938313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684938313 is an equidigital number, since it uses as much as digits as its factorization.

1684938313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 46.

The square root of 1684938313 is about 41048.0001096278. Note that the first 3 decimals coincide. The cubic root of 1684938313 is about 1189.9480506004.

The spelling of 1684938313 in words is "one billion, six hundred eighty-four million, nine hundred thirty-eight thousand, three hundred thirteen".