5071890821 has 4 divisors (see below), whose sum is σ = 5147590752. Its totient is φ = 4996190892.

The previous prime is 5071890779. The next prime is 5071890829. The reversal of 5071890821 is 1280981705.

5071890821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5071890821 - 2¹⁸ = 5071628677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5071890829) 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, 37849865 + ... + 37849998.

It is an arithmetic number, because the mean of its divisors is an integer number (1286897688).

Almost surely, 2^5071890821 is an apocalyptic number.

It is an amenable number.

5071890821 is a deficient number, since it is larger than the sum of its proper divisors (75699931).

5071890821 is an equidigital number, since it uses as much as digits as its factorization.

5071890821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75699930.

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 5071890821 is about 71217.2087419888. The cubic root of 5071890821 is about 1718.1324173123.

The spelling of 5071890821 in words is "five billion, seventy-one million, eight hundred ninety thousand, eight hundred twenty-one".