6918739 has 2 divisors, whose sum is σ = 6918740. Its totient is φ = 6918738.

The previous prime is 6918731. The next prime is 6918749. The reversal of 6918739 is 9378196.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6918739 - 2³ = 6918731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6918695 and 6918704.

It is not a weakly prime, because it can be changed into another prime (6918731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3459369 + 3459370.

It is an arithmetic number, because the mean of its divisors is an integer number (3459370).

Almost surely, 2^6918739 is an apocalyptic number.

6918739 is a deficient number, since it is larger than the sum of its proper divisors (1).

6918739 is an equidigital number, since it uses as much as digits as its factorization.

6918739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 43.

The square root of 6918739 is about 2630.3495965366. The cubic root of 6918739 is about 190.5500129317.

The spelling of 6918739 in words is "six million, nine hundred eighteen thousand, seven hundred thirty-nine".