7918961 has 2 divisors, whose sum is σ = 7918962. Its totient is φ = 7918960.

The previous prime is 7918951. The next prime is 7918979. The reversal of 7918961 is 1698197.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7840000 + 78961 = 2800^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 7918961 - 2²² = 3724657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7918951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3959480 + 3959481.

It is an arithmetic number, because the mean of its divisors is an integer number (3959481).

Almost surely, 2^7918961 is an apocalyptic number.

It is an amenable number.

7918961 is a deficient number, since it is larger than the sum of its proper divisors (1).

7918961 is an equidigital number, since it uses as much as digits as its factorization.

7918961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 41.

The square root of 7918961 is about 2814.0648535526. The cubic root of 7918961 is about 199.3223817604.

The spelling of 7918961 in words is "seven million, nine hundred eighteen thousand, nine hundred sixty-one".