11561967 has 8 divisors (see below), whose sum is σ = 17128880. Its totient is φ = 7707960.

The previous prime is 11561917. The next prime is 11561971. The reversal of 11561967 is 76916511.

It is a happy number.

11561967 is a `hidden beast` number, since 1 + 1 + 561 + 96 + 7 = 666.

It is not a de Polignac number, because 11561967 - 2⁶ = 11561903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214084 + ... + 214137.

It is an arithmetic number, because the mean of its divisors is an integer number (2141110).

Almost surely, 2^11561967 is an apocalyptic number.

11561967 is a deficient number, since it is larger than the sum of its proper divisors (5566913).

11561967 is an equidigital number, since it uses as much as digits as its factorization.

11561967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428230 (or 428224 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 11561967 is about 3400.2892524019. The cubic root of 11561967 is about 226.1225677596.

The spelling of 11561967 in words is "eleven million, five hundred sixty-one thousand, nine hundred sixty-seven".