8437861 has 2 divisors, whose sum is σ = 8437862. Its totient is φ = 8437860.

The previous prime is 8437837. The next prime is 8437879. The reversal of 8437861 is 1687348.

It is a happy number.

8437861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5909761 + 2528100 = 2431^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 8437861 - 2⁷ = 8437733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8437861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8431861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4218930 + 4218931.

It is an arithmetic number, because the mean of its divisors is an integer number (4218931).

Almost surely, 2^8437861 is an apocalyptic number.

It is an amenable number.

8437861 is a deficient number, since it is larger than the sum of its proper divisors (1).

8437861 is an equidigital number, since it uses as much as digits as its factorization.

8437861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 8437861 is about 2904.7996488570. The cubic root of 8437861 is about 203.5842246247.

The spelling of 8437861 in words is "eight million, four hundred thirty-seven thousand, eight hundred sixty-one".