56819911 has 2 divisors, whose sum is σ = 56819912. Its totient is φ = 56819910.

The previous prime is 56819897. The next prime is 56820047. The reversal of 56819911 is 11991865.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56819911 - 2⁵ = 56819879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56819111) 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, 28409955 + 28409956.

It is an arithmetic number, because the mean of its divisors is an integer number (28409956).

Almost surely, 2^56819911 is an apocalyptic number.

56819911 is a deficient number, since it is larger than the sum of its proper divisors (1).

56819911 is an equidigital number, since it uses as much as digits as its factorization.

56819911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 40.

The square root of 56819911 is about 7537.8983145171. The cubic root of 56819911 is about 384.4443798440. Note that the first 3 decimals are identical.

The spelling of 56819911 in words is "fifty-six million, eight hundred nineteen thousand, nine hundred eleven".