8387641 has 8 divisors (see below), whose sum is σ = 8912520. Its totient is φ = 7878528.

The previous prime is 8387611. The next prime is 8387671. The reversal of 8387641 is 1467838.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8387611) and next prime (8387671).

It can be written as a sum of positive squares in 4 ways, for example, as 570025 + 7817616 = 755^2 + 2796^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8387641 - 2⁵ = 8387609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8387641.

It is not an unprimeable number, because it can be changed into a prime (8387611) 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 7 ways as a sum of consecutive naturals, for example, 2836 + ... + 4981.

It is an arithmetic number, because the mean of its divisors is an integer number (1114065).

Almost surely, 2^8387641 is an apocalyptic number.

It is an amenable number.

8387641 is a deficient number, since it is larger than the sum of its proper divisors (524879).

8387641 is a wasteful number, since it uses less digits than its factorization.

8387641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7883.

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

The square root of 8387641 is about 2896.1424343426. The cubic root of 8387641 is about 203.1795268526.

The spelling of 8387641 in words is "eight million, three hundred eighty-seven thousand, six hundred forty-one".