8319861 has 32 divisors (see below), whose sum is σ = 13622400. Its totient is φ = 4976640.

The previous prime is 8319847. The next prime is 8319863. The reversal of 8319861 is 1689138.

It is not a de Polignac number, because 8319861 - 2⁷ = 8319733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8319863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32245 + ... + 32501.

It is an arithmetic number, because the mean of its divisors is an integer number (425700).

Almost surely, 2^8319861 is an apocalyptic number.

It is an amenable number.

8319861 is a deficient number, since it is larger than the sum of its proper divisors (5302539).

8319861 is a wasteful number, since it uses less digits than its factorization.

8319861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 380 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 8319861 is about 2884.4169254808. The cubic root of 8319861 is about 202.6307523190.

It can be divided in two parts, 8319 and 861, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 8319861 in words is "eight million, three hundred nineteen thousand, eight hundred sixty-one".