6918913 has 4 divisors (see below), whose sum is σ = 6990340. Its totient is φ = 6847488.

The previous prime is 6918853. The next prime is 6918943. The reversal of 6918913 is 3198196.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1192464 + 5726449 = 1092^2 + 2393^2 .

It is a cyclic number.

It is not a de Polignac number, because 6918913 - 2¹⁷ = 6787841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6918943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35568 + ... + 35761.

It is an arithmetic number, because the mean of its divisors is an integer number (1747585).

Almost surely, 2^6918913 is an apocalyptic number.

It is an amenable number.

6918913 is a deficient number, since it is larger than the sum of its proper divisors (71427).

6918913 is an equidigital number, since it uses as much as digits as its factorization.

6918913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71426.

The product of its digits is 11664, while the sum is 37.

The square root of 6918913 is about 2630.3826717799. The cubic root of 6918913 is about 190.5516103049.

It can be divided in two parts, 691 and 8913, that added together give a square (9604 = 98²).

The spelling of 6918913 in words is "six million, nine hundred eighteen thousand, nine hundred thirteen".