6861397 has 2 divisors, whose sum is σ = 6861398. Its totient is φ = 6861396.

The previous prime is 6861377. The next prime is 6861401. The reversal of 6861397 is 7931686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4813636 + 2047761 = 2194^2 + 1431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6861397 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6861307) 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, 3430698 + 3430699.

It is an arithmetic number, because the mean of its divisors is an integer number (3430699).

Almost surely, 2^6861397 is an apocalyptic number.

It is an amenable number.

6861397 is a deficient number, since it is larger than the sum of its proper divisors (1).

6861397 is an equidigital number, since it uses as much as digits as its factorization.

6861397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 6861397 is about 2619.4268457050. The cubic root of 6861397 is about 190.0221303862.

The spelling of 6861397 in words is "six million, eight hundred sixty-one thousand, three hundred ninety-seven".