53803891 has 4 divisors (see below), whose sum is σ = 54685984. Its totient is φ = 52921800.

The previous prime is 53803889. The next prime is 53803901. The reversal of 53803891 is 19830835.

53803891 = 909² + 910² + ... + 969².

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53803891 - 2¹ = 53803889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53803891.

It is not an unprimeable number, because it can be changed into a prime (53803591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440955 + ... + 441076.

It is an arithmetic number, because the mean of its divisors is an integer number (13671496).

Almost surely, 2^53803891 is an apocalyptic number.

53803891 is a deficient number, since it is larger than the sum of its proper divisors (882093).

53803891 is an equidigital number, since it uses as much as digits as its factorization.

53803891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882092.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 53803891 is about 7335.1135642197. The cubic root of 53803891 is about 377.5182009557.

The spelling of 53803891 in words is "fifty-three million, eight hundred three thousand, eight hundred ninety-one".