53506891 has 2 divisors, whose sum is σ = 53506892. Its totient is φ = 53506890.

The previous prime is 53506879. The next prime is 53506897. The reversal of 53506891 is 19860535.

53506891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53506891 - 2⁹ = 53506379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53506891.

It is not a weakly prime, because it can be changed into another prime (53506897) 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, 26753445 + 26753446.

It is an arithmetic number, because the mean of its divisors is an integer number (26753446).

Almost surely, 2^53506891 is an apocalyptic number.

53506891 is a deficient number, since it is larger than the sum of its proper divisors (1).

53506891 is an equidigital number, since it uses as much as digits as its factorization.

53506891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 53506891 is about 7314.8404630586. The cubic root of 53506891 is about 376.8222794866.

It can be divided in two parts, 53 and 506891, that added together give a square (506944 = 712²).

The spelling of 53506891 in words is "fifty-three million, five hundred six thousand, eight hundred ninety-one".