6863881 has 2 divisors, whose sum is σ = 6863882. Its totient is φ = 6863880.

The previous prime is 6863873. The next prime is 6863887. The reversal of 6863881 is 1883686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4239481 + 2624400 = 2059^2 + 1620^2 .

It is a cyclic number.

It is not a de Polignac number, because 6863881 - 2³ = 6863873 is a prime.

It is a super-2 number, since 2×6863881² = 94225724764322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6863887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3431940 + 3431941.

It is an arithmetic number, because the mean of its divisors is an integer number (3431941).

Almost surely, 2^6863881 is an apocalyptic number.

It is an amenable number.

6863881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6863881 is an equidigital number, since it uses as much as digits as its factorization.

6863881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 40.

The square root of 6863881 is about 2619.9009523263. The cubic root of 6863881 is about 190.0450585656.

It can be divided in two parts, 6863 and 881, that added together give a square (7744 = 88²).

The spelling of 6863881 in words is "six million, eight hundred sixty-three thousand, eight hundred eighty-one".