918968305 has 4 divisors (see below), whose sum is σ = 1102761972. Its totient is φ = 735174640.

The previous prime is 918968293. The next prime is 918968321. The reversal of 918968305 is 503869819.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503869819 = 653 ⋅771623.

It can be written as a sum of positive squares in 2 ways, for example, as 558424161 + 360544144 = 23631^2 + 18988^2 .

It is not a de Polignac number, because 918968305 - 2⁷ = 918968177 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91896826 + ... + 91896835.

It is an arithmetic number, because the mean of its divisors is an integer number (275690493).

Almost surely, 2^918968305 is an apocalyptic number.

It is an amenable number.

918968305 is a deficient number, since it is larger than the sum of its proper divisors (183793667).

918968305 is a wasteful number, since it uses less digits than its factorization.

918968305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183793666.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 918968305 is about 30314.4900171519. The cubic root of 918968305 is about 972.2251340660.

The spelling of 918968305 in words is "nine hundred eighteen million, nine hundred sixty-eight thousand, three hundred five".