11911361 has 30 divisors (see below), whose sum is σ = 15646386. Its totient is φ = 9055200.

The previous prime is 11911357. The next prime is 11911363. The reversal of 11911361 is 16311911.

It can be written as a sum of positive squares in only one way, i.e., 7263025 + 4648336 = 2695^2 + 2156^2 .

It is not a de Polignac number, because 11911361 - 2² = 11911357 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11911363) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 290501 + ... + 290541.

Almost surely, 2^11911361 is an apocalyptic number.

11911361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11911361 is a deficient number, since it is larger than the sum of its proper divisors (3735025).

11911361 is an frugal number, since it uses more digits than its factorization.

11911361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 59 counting only the distinct ones).

The product of its digits is 162, while the sum is 23.

The square root of 11911361 is about 3451.2839639763. The cubic root of 11911361 is about 228.3777530337.

It can be divided in two parts, 1191 and 1361, that added together give a palindrome (2552).

The spelling of 11911361 in words is "eleven million, nine hundred eleven thousand, three hundred sixty-one".