683930909 has 2 divisors, whose sum is σ = 683930910. Its totient is φ = 683930908.

The previous prime is 683930899. The next prime is 683930917. The reversal of 683930909 is 909039386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 477204025 + 206726884 = 21845^2 + 14378^2 .

It is a cyclic number.

It is not a de Polignac number, because 683930909 - 2²⁴ = 667153693 is a prime.

It is a super-2 number, since 2×683930909² = 935522976571132562, 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 (683930939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341965454 + 341965455.

It is an arithmetic number, because the mean of its divisors is an integer number (341965455).

Almost surely, 2^683930909 is an apocalyptic number.

It is an amenable number.

683930909 is a deficient number, since it is larger than the sum of its proper divisors (1).

683930909 is an equidigital number, since it uses as much as digits as its factorization.

683930909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 683930909 is about 26152.0727476810. The cubic root of 683930909 is about 881.0571442305.

The spelling of 683930909 in words is "six hundred eighty-three million, nine hundred thirty thousand, nine hundred nine".