9918959 has 2 divisors, whose sum is σ = 9918960. Its totient is φ = 9918958.

The previous prime is 9918949. The next prime is 9918983. The reversal of 9918959 is 9598199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9918959 - 2¹⁶ = 9853423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9918949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4959479 + 4959480.

It is an arithmetic number, because the mean of its divisors is an integer number (4959480).

Almost surely, 2^9918959 is an apocalyptic number.

9918959 is a deficient number, since it is larger than the sum of its proper divisors (1).

9918959 is an equidigital number, since it uses as much as digits as its factorization.

9918959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 50.

The square root of 9918959 is about 3149.4378863537. The cubic root of 9918959 is about 214.8598979074.

The spelling of 9918959 in words is "nine million, nine hundred eighteen thousand, nine hundred fifty-nine".