11213939 has 4 divisors (see below), whose sum is σ = 12233400. Its totient is φ = 10194480.

The previous prime is 11213843. The next prime is 11213957. The reversal of 11213939 is 93931211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11213939 - 2¹² = 11209843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11213539) 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, 509714 + ... + 509735.

It is an arithmetic number, because the mean of its divisors is an integer number (3058350).

Almost surely, 2^11213939 is an apocalyptic number.

11213939 is a deficient number, since it is larger than the sum of its proper divisors (1019461).

11213939 is a wasteful number, since it uses less digits than its factorization.

11213939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019460.

The product of its digits is 1458, while the sum is 29.

The square root of 11213939 is about 3348.7219950303. The cubic root of 11213939 is about 223.8305678251.

The spelling of 11213939 in words is "eleven million, two hundred thirteen thousand, nine hundred thirty-nine".