11211973 has 8 divisors (see below), whose sum is σ = 11383128. Its totient is φ = 11042304.

The previous prime is 11211961. The next prime is 11211989. The reversal of 11211973 is 37911211.

It can be written as a sum of positive squares in 4 ways, for example, as 3157729 + 8054244 = 1777^2 + 2838^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11211973 - 2¹³ = 11203781 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 (11211913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35211 + ... + 35527.

It is an arithmetic number, because the mean of its divisors is an integer number (1422891).

Almost surely, 2^11211973 is an apocalyptic number.

It is an amenable number.

11211973 is a deficient number, since it is larger than the sum of its proper divisors (171155).

11211973 is a wasteful number, since it uses less digits than its factorization.

11211973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its digits is 378, while the sum is 25.

The square root of 11211973 is about 3348.4284373419. The cubic root of 11211973 is about 223.8174865871.

The spelling of 11211973 in words is "eleven million, two hundred eleven thousand, nine hundred seventy-three".