918334909 has 4 divisors (see below), whose sum is σ = 950001660. Its totient is φ = 886668160.

The previous prime is 918334903. The next prime is 918334939. The reversal of 918334909 is 909433819.

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 623251225 + 295083684 = 24965^2 + 17178^2 .

It is a cyclic number.

It is not a de Polignac number, because 918334909 - 2⁵ = 918334877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918334903) 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, 15833332 + ... + 15833389.

It is an arithmetic number, because the mean of its divisors is an integer number (237500415).

Almost surely, 2^918334909 is an apocalyptic number.

It is an amenable number.

918334909 is a deficient number, since it is larger than the sum of its proper divisors (31666751).

918334909 is a wasteful number, since it uses less digits than its factorization.

918334909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31666750.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 918334909 is about 30304.0411331558. The cubic root of 918334909 is about 972.0017150274.

The spelling of 918334909 in words is "nine hundred eighteen million, three hundred thirty-four thousand, nine hundred nine".