11813013 has 8 divisors (see below), whose sum is σ = 17500800. Its totient is φ = 7875324.

The previous prime is 11812991. The next prime is 11813017. The reversal of 11813013 is 31031811.

It is a happy number.

It is not a de Polignac number, because 11813013 - 2⁵ = 11812981 is a prime.

It is a super-2 number, since 2×11813013² = 279094552276338, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11813017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218733 + ... + 218786.

It is an arithmetic number, because the mean of its divisors is an integer number (2187600).

Almost surely, 2^11813013 is an apocalyptic number.

It is an amenable number.

11813013 is a deficient number, since it is larger than the sum of its proper divisors (5687787).

11813013 is an equidigital number, since it uses as much as digits as its factorization.

11813013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437528 (or 437522 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 11813013 is about 3437.0064009251. The cubic root of 11813013 is about 227.7474697110.

Adding to 11813013 its reverse (31031811), we get a palindrome (42844824).

It can be divided in two parts, 118 and 13013, that added together give a palindrome (13131).

The spelling of 11813013 in words is "eleven million, eight hundred thirteen thousand, thirteen".