11933905 has 4 divisors (see below), whose sum is σ = 14320692. Its totient is φ = 9547120.

The previous prime is 11933903. The next prime is 11933923. The reversal of 11933905 is 50933911.

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 8832784 + 3101121 = 2972^2 + 1761^2 .

It is not a de Polignac number, because 11933905 - 2¹ = 11933903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11933903) 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 3 ways as a sum of consecutive naturals, for example, 1193386 + ... + 1193395.

It is an arithmetic number, because the mean of its divisors is an integer number (3580173).

Almost surely, 2^11933905 is an apocalyptic number.

It is an amenable number.

11933905 is a deficient number, since it is larger than the sum of its proper divisors (2386787).

11933905 is an equidigital number, since it uses as much as digits as its factorization.

11933905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386786.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 11933905 is about 3454.5484509556. The cubic root of 11933905 is about 228.5217417110.

The spelling of 11933905 in words is "eleven million, nine hundred thirty-three thousand, nine hundred five".