53808891 has 16 divisors (see below), whose sum is σ = 77448960. Its totient is φ = 33128480.

The previous prime is 53808889. The next prime is 53808899. The reversal of 53808891 is 19880835.

It is a cyclic number.

It is not a de Polignac number, because 53808891 - 2¹ = 53808889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53808899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11445 + ... + 15446.

It is an arithmetic number, because the mean of its divisors is an integer number (4840560).

Almost surely, 2^53808891 is an apocalyptic number.

53808891 is a deficient number, since it is larger than the sum of its proper divisors (23640069).

53808891 is a wasteful number, since it uses less digits than its factorization.

53808891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26946.

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 53808891 is about 7335.4543826542. The cubic root of 53808891 is about 377.5298948592.

The spelling of 53808891 in words is "fifty-three million, eight hundred eight thousand, eight hundred ninety-one".