918013 has 4 divisors (see below), whose sum is σ = 935388. Its totient is φ = 900640.

The previous prime is 918011. The next prime is 918019. The reversal of 918013 is 310819.

918013 = 677² + 678².

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 458329 + 459684 = 677^2 + 678^2 .

It is a cyclic number.

It is not a de Polignac number, because 918013 - 2¹ = 918011 is a prime.

It is a Smith number, since the sum of its digits (22) 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8608 + ... + 8713.

It is an arithmetic number, because the mean of its divisors is an integer number (233847).

2⁹¹⁸⁰¹³ is an apocalyptic number.

918013 is the 678-th centered square number.

It is an amenable number.

918013 is a deficient number, since it is larger than the sum of its proper divisors (17375).

918013 is a wasteful number, since it uses less digits than its factorization.

918013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17374.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 918013 is about 958.1299494327. The cubic root of 918013 is about 97.1888128047.

The spelling of 918013 in words is "nine hundred eighteen thousand, thirteen".