11938013 has 4 divisors (see below), whose sum is σ = 12260700. Its totient is φ = 11615328.

The previous prime is 11937983. The next prime is 11938019. The reversal of 11938013 is 31083911.

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 11580409 + 357604 = 3403^2 + 598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11938013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11938019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161288 + ... + 161361.

It is an arithmetic number, because the mean of its divisors is an integer number (3065175).

Almost surely, 2^11938013 is an apocalyptic number.

It is an amenable number.

11938013 is a deficient number, since it is larger than the sum of its proper divisors (322687).

11938013 is an equidigital number, since it uses as much as digits as its factorization.

11938013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322686.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 11938013 is about 3455.1429782283. The cubic root of 11938013 is about 228.5479599974.

The spelling of 11938013 in words is "eleven million, nine hundred thirty-eight thousand, thirteen".