6861913 has 2 divisors, whose sum is σ = 6861914. Its totient is φ = 6861912.

The previous prime is 6861851. The next prime is 6861923. The reversal of 6861913 is 3191686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6594624 + 267289 = 2568^2 + 517^2 .

It is a cyclic number.

It is not a de Polignac number, because 6861913 - 2⁹ = 6861401 is a prime.

It is not a weakly prime, because it can be changed into another prime (6861923) 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, 3430956 + 3430957.

It is an arithmetic number, because the mean of its divisors is an integer number (3430957).

Almost surely, 2^6861913 is an apocalyptic number.

It is an amenable number.

6861913 is a deficient number, since it is larger than the sum of its proper divisors (1).

6861913 is an equidigital number, since it uses as much as digits as its factorization.

6861913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 6861913 is about 2619.5253386826. The cubic root of 6861913 is about 190.0268937001.

The spelling of 6861913 in words is "six million, eight hundred sixty-one thousand, nine hundred thirteen".