1081813 has 2 divisors, whose sum is σ = 1081814. Its totient is φ = 1081812.

The previous prime is 1081793. The next prime is 1081823. The reversal of 1081813 is 3181801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1034289 + 47524 = 1017^2 + 218^2 .

It is a cyclic number.

It is not a de Polignac number, because 1081813 - 2⁵ = 1081781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540906 + 540907.

It is an arithmetic number, because the mean of its divisors is an integer number (540907).

2^1081813 is an apocalyptic number.

It is an amenable number.

1081813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081813 is an equidigital number, since it uses as much as digits as its factorization.

1081813 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 1081813 is about 1040.1023988050. The cubic root of 1081813 is about 102.6559355644.

The spelling of 1081813 in words is "one million, eighty-one thousand, eight hundred thirteen".