8238661 has 4 divisors (see below), whose sum is σ = 8318752. Its totient is φ = 8158572.

The previous prime is 8238619. The next prime is 8238683. The reversal of 8238661 is 1668328.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8238661 - 2¹⁵ = 8205893 is a prime.

It is a Duffinian number.

8238661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8238361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39891 + ... + 40096.

It is an arithmetic number, because the mean of its divisors is an integer number (2079688).

Almost surely, 2^8238661 is an apocalyptic number.

It is an amenable number.

8238661 is a deficient number, since it is larger than the sum of its proper divisors (80091).

8238661 is a wasteful number, since it uses less digits than its factorization.

8238661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80090.

The product of its digits is 13824, while the sum is 34.

The square root of 8238661 is about 2870.3067780291. The cubic root of 8238661 is about 201.9693856163.

The spelling of 8238661 in words is "eight million, two hundred thirty-eight thousand, six hundred sixty-one".