11561953 has 16 divisors (see below), whose sum is σ = 12902400. Its totient is φ = 10293696.

The previous prime is 11561917. The next prime is 11561971. The reversal of 11561953 is 35916511.

11561953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11561953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11561903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77523 + ... + 77671.

It is an arithmetic number, because the mean of its divisors is an integer number (806400).

Almost surely, 2^11561953 is an apocalyptic number.

11561953 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11561953 is a deficient number, since it is larger than the sum of its proper divisors (1340447).

11561953 is a wasteful number, since it uses less digits than its factorization.

11561953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336.

The product of its digits is 4050, while the sum is 31.

The square root of 11561953 is about 3400.2871937529. The cubic root of 11561953 is about 226.1224764914.

The spelling of 11561953 in words is "eleven million, five hundred sixty-one thousand, nine hundred fifty-three".