5378438521 has 4 divisors (see below), whose sum is σ = 5378591232. Its totient is φ = 5378285812.

The previous prime is 5378438459. The next prime is 5378438531. The reversal of 5378438521 is 1258348735.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5378438521 - 2¹¹ = 5378436473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5378438531) 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, 6300 + ... + 103906.

It is an arithmetic number, because the mean of its divisors is an integer number (1344647808).

Almost surely, 2^5378438521 is an apocalyptic number.

It is an amenable number.

5378438521 is a deficient number, since it is larger than the sum of its proper divisors (152711).

5378438521 is an equidigital number, since it uses as much as digits as its factorization.

5378438521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152710.

The product of its digits is 806400, while the sum is 46.

The square root of 5378438521 is about 73337.8382623868. The cubic root of 5378438521 is about 1752.0724856941.

The spelling of 5378438521 in words is "five billion, three hundred seventy-eight million, four hundred thirty-eight thousand, five hundred twenty-one".