6849881 has 2 divisors, whose sum is σ = 6849882. Its totient is φ = 6849880.

The previous prime is 6849877. The next prime is 6849893. The reversal of 6849881 is 1889486.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3667225 + 3182656 = 1915^2 + 1784^2 .

It is a cyclic number.

It is not a de Polignac number, because 6849881 - 2² = 6849877 is a prime.

It is a super-2 number, since 2×6849881² = 93841739428322, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (6849851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3424940 + 3424941.

It is an arithmetic number, because the mean of its divisors is an integer number (3424941).

Almost surely, 2^6849881 is an apocalyptic number.

It is an amenable number.

6849881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6849881 is an equidigital number, since it uses as much as digits as its factorization.

6849881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 44.

The square root of 6849881 is about 2617.2277317803. The cubic root of 6849881 is about 189.9157613647.

The spelling of 6849881 in words is "six million, eight hundred forty-nine thousand, eight hundred eighty-one".