6840929 has 2 divisors, whose sum is σ = 6840930. Its totient is φ = 6840928.

The previous prime is 6840871. The next prime is 6840941. The reversal of 6840929 is 9290486.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6838225 + 2704 = 2615^2 + 52^2 .

It is a cyclic number.

It is not a de Polignac number, because 6840929 - 2¹⁶ = 6775393 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6840892 and 6840901.

It is not a weakly prime, because it can be changed into another prime (6840979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3420464 + 3420465.

It is an arithmetic number, because the mean of its divisors is an integer number (3420465).

Almost surely, 2^6840929 is an apocalyptic number.

It is an amenable number.

6840929 is a deficient number, since it is larger than the sum of its proper divisors (1).

6840929 is an equidigital number, since it uses as much as digits as its factorization.

6840929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 6840929 is about 2615.5169661082. The cubic root of 6840929 is about 189.8329926734.

The spelling of 6840929 in words is "six million, eight hundred forty thousand, nine hundred twenty-nine".