11561423 has 2 divisors, whose sum is σ = 11561424. Its totient is φ = 11561422.

The previous prime is 11561371. The next prime is 11561447. The reversal of 11561423 is 32416511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11561423 - 2⁶ = 11561359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11563423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5780711 + 5780712.

It is an arithmetic number, because the mean of its divisors is an integer number (5780712).

Almost surely, 2^11561423 is an apocalyptic number.

11561423 is a deficient number, since it is larger than the sum of its proper divisors (1).

11561423 is an equidigital number, since it uses as much as digits as its factorization.

11561423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 11561423 is about 3400.2092582663. The cubic root of 11561423 is about 226.1190212867.

Adding to 11561423 its reverse (32416511), we get a palindrome (43977934).

The spelling of 11561423 in words is "eleven million, five hundred sixty-one thousand, four hundred twenty-three".