8003861 has 2 divisors, whose sum is σ = 8003862. Its totient is φ = 8003860.

The previous prime is 8003857. The next prime is 8003867. The reversal of 8003861 is 1683008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6027025 + 1976836 = 2455^2 + 1406^2 .

It is a cyclic number.

It is not a de Polignac number, because 8003861 - 2² = 8003857 is a prime.

8003861 is a modest number, since divided by 3861 gives 8 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 8003861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8003867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4001930 + 4001931.

It is an arithmetic number, because the mean of its divisors is an integer number (4001931).

Almost surely, 2^8003861 is an apocalyptic number.

It is an amenable number.

8003861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8003861 is an equidigital number, since it uses as much as digits as its factorization.

8003861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 8003861 is about 2829.1095772345. The cubic root of 8003861 is about 200.0321698252.

Adding to 8003861 its reverse (1683008), we get a palindrome (9686869).

The spelling of 8003861 in words is "eight million, three thousand, eight hundred sixty-one".