11027813 has 4 divisors (see below), whose sum is σ = 11325900. Its totient is φ = 10729728.

The previous prime is 11027777. The next prime is 11027839. The reversal of 11027813 is 31872011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31872011 = 103 ⋅309437.

It can be written as a sum of positive squares in 2 ways, for example, as 10484644 + 543169 = 3238^2 + 737^2 .

It is a cyclic number.

It is not a de Polignac number, because 11027813 - 2¹² = 11023717 is a prime.

It is a super-2 number, since 2×11027813² = 243225319125938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11027873) 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, 148988 + ... + 149061.

It is an arithmetic number, because the mean of its divisors is an integer number (2831475).

Almost surely, 2^11027813 is an apocalyptic number.

It is an amenable number.

11027813 is a deficient number, since it is larger than the sum of its proper divisors (298087).

11027813 is an equidigital number, since it uses as much as digits as its factorization.

11027813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298086.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 11027813 is about 3320.8151107823. The cubic root of 11027813 is about 222.5852923853.

Adding to 11027813 its reverse (31872011), we get a palindrome (42899824).

The spelling of 11027813 in words is "eleven million, twenty-seven thousand, eight hundred thirteen".