1684938293 has 2 divisors, whose sum is σ = 1684938294. Its totient is φ = 1684938292.

The previous prime is 1684938253. The next prime is 1684938313. The reversal of 1684938293 is 3928394861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988347844 + 696590449 = 31438^2 + 26393^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684938293 - 2²⁸ = 1416502837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1684938253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842469146 + 842469147.

It is an arithmetic number, because the mean of its divisors is an integer number (842469147).

Almost surely, 2^1684938293 is an apocalyptic number.

It is an amenable number.

1684938293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684938293 is an equidigital number, since it uses as much as digits as its factorization.

1684938293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 53.

The square root of 1684938293 is about 41047.9998660105. Note that the first 3 decimals coincide. The cubic root of 1684938293 is about 1189.9480458922.

The spelling of 1684938293 in words is "one billion, six hundred eighty-four million, nine hundred thirty-eight thousand, two hundred ninety-three".