56641187 has 2 divisors, whose sum is σ = 56641188. Its totient is φ = 56641186.

The previous prime is 56641141. The next prime is 56641201. The reversal of 56641187 is 78114665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56641187 - 2¹⁰ = 56640163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56641187.

It is not a weakly prime, because it can be changed into another prime (56640187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28320593 + 28320594.

It is an arithmetic number, because the mean of its divisors is an integer number (28320594).

Almost surely, 2^56641187 is an apocalyptic number.

56641187 is a deficient number, since it is larger than the sum of its proper divisors (1).

56641187 is an equidigital number, since it uses as much as digits as its factorization.

56641187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 56641187 is about 7526.0339489003. The cubic root of 56641187 is about 384.0408733800.

The spelling of 56641187 in words is "fifty-six million, six hundred forty-one thousand, one hundred eighty-seven".