11996905 has 4 divisors (see below), whose sum is σ = 14396292. Its totient is φ = 9597520.

The previous prime is 11996857. The next prime is 11996909. The reversal of 11996905 is 50969911.

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 8139609 + 3857296 = 2853^2 + 1964^2 .

It is not a de Polignac number, because 11996905 - 2⁹ = 11996393 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11996909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1199686 + ... + 1199695.

It is an arithmetic number, because the mean of its divisors is an integer number (3599073).

Almost surely, 2^11996905 is an apocalyptic number.

It is an amenable number.

11996905 is a deficient number, since it is larger than the sum of its proper divisors (2399387).

11996905 is an equidigital number, since it uses as much as digits as its factorization.

11996905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2399386.

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 11996905 is about 3463.6548615588. The cubic root of 11996905 is about 228.9231640928.

The spelling of 11996905 in words is "eleven million, nine hundred ninety-six thousand, nine hundred five".