683849381 has 2 divisors, whose sum is σ = 683849382. Its totient is φ = 683849380.

The previous prime is 683849329. The next prime is 683849393. The reversal of 683849381 is 183948386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572884225 + 110965156 = 23935^2 + 10534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-683849381 is a prime.

It is a super-2 number, since 2×683849381² = 935299951788166322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (683849681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341924690 + 341924691.

It is an arithmetic number, because the mean of its divisors is an integer number (341924691).

Almost surely, 2^683849381 is an apocalyptic number.

It is an amenable number.

683849381 is a deficient number, since it is larger than the sum of its proper divisors (1).

683849381 is an equidigital number, since it uses as much as digits as its factorization.

683849381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 50.

The square root of 683849381 is about 26150.5139720045. The cubic root of 683849381 is about 881.0221340268.

The spelling of 683849381 in words is "six hundred eighty-three million, eight hundred forty-nine thousand, three hundred eighty-one".