8118961 has 4 divisors (see below), whose sum is σ = 8160372. Its totient is φ = 8077552.

The previous prime is 8118953. The next prime is 8118973. The reversal of 8118961 is 1698118.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8065600 + 53361 = 2840^2 + 231^2 .

It is a cyclic number.

It is not a de Polignac number, because 8118961 - 2³ = 8118953 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8118991) 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, 20410 + ... + 20803.

It is an arithmetic number, because the mean of its divisors is an integer number (2040093).

Almost surely, 2^8118961 is an apocalyptic number.

It is an amenable number.

8118961 is a deficient number, since it is larger than the sum of its proper divisors (41411).

8118961 is a wasteful number, since it uses less digits than its factorization.

8118961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41410.

The product of its digits is 3456, while the sum is 34.

The square root of 8118961 is about 2849.3790551627. The cubic root of 8118961 is about 200.9864680708.

The spelling of 8118961 in words is "eight million, one hundred eighteen thousand, nine hundred sixty-one".