11039905 has 4 divisors (see below), whose sum is σ = 13247892. Its totient is φ = 8831920.

The previous prime is 11039887. The next prime is 11039909. The reversal of 11039905 is 50993011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50993011 = 61 ⋅835951.

It can be written as a sum of positive squares in 2 ways, for example, as 1846881 + 9193024 = 1359^2 + 3032^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11039905 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11039909) 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, 1103986 + ... + 1103995.

It is an arithmetic number, because the mean of its divisors is an integer number (3311973).

Almost surely, 2^11039905 is an apocalyptic number.

It is an amenable number.

11039905 is a deficient number, since it is larger than the sum of its proper divisors (2207987).

11039905 is an equidigital number, since it uses as much as digits as its factorization.

11039905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207986.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 11039905 is about 3322.6352493164. The cubic root of 11039905 is about 222.6666176131. Note that the first 4 decimals are identical.

The spelling of 11039905 in words is "eleven million, thirty-nine thousand, nine hundred five".