1018813 has 2 divisors, whose sum is σ = 1018814. Its totient is φ = 1018812.

The previous prime is 1018811. The next prime is 1018817. The reversal of 1018813 is 3188101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 813604 + 205209 = 902^2 + 453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1018813 - 2¹ = 1018811 is a prime.

Together with 1018811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1018811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509406 + 509407.

It is an arithmetic number, because the mean of its divisors is an integer number (509407).

2^1018813 is an apocalyptic number.

It is an amenable number.

1018813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018813 is an equidigital number, since it uses as much as digits as its factorization.

1018813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 1018813 is about 1009.3626702033. The cubic root of 1018813 is about 100.6232080491.

It can be divided in two parts, 10188 and 13, that added together give a palindrome (10201).

The spelling of 1018813 in words is "one million, eighteen thousand, eight hundred thirteen".