5239616891 has 4 divisors (see below), whose sum is σ = 5313414384. Its totient is φ = 5165819400.

The previous prime is 5239616849. The next prime is 5239616897. The reversal of 5239616891 is 1986169325.

It is a happy number.

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 5239616891 - 2¹⁰ = 5239615867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5239616897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36898640 + ... + 36898781.

It is an arithmetic number, because the mean of its divisors is an integer number (1328353596).

Almost surely, 2^5239616891 is an apocalyptic number.

5239616891 is a deficient number, since it is larger than the sum of its proper divisors (73797493).

5239616891 is an equidigital number, since it uses as much as digits as its factorization.

5239616891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73797492.

The product of its digits is 699840, while the sum is 50.

The square root of 5239616891 is about 72385.1980103667. The cubic root of 5239616891 is about 1736.8667896443.

The spelling of 5239616891 in words is "five billion, two hundred thirty-nine million, six hundred sixteen thousand, eight hundred ninety-one".