8421541393 has 4 divisors (see below), whose sum is σ = 8468069428. Its totient is φ = 8375013360.

The previous prime is 8421541367. The next prime is 8421541441. The reversal of 8421541393 is 3931451248.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1575137344 + 6846404049 = 39688^2 + 82743^2 .

It is a cyclic number.

It is not a de Polignac number, because 8421541393 - 2²⁵ = 8387986961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8421541363) 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, 23263746 + ... + 23264107.

It is an arithmetic number, because the mean of its divisors is an integer number (2117017357).

Almost surely, 2^8421541393 is an apocalyptic number.

It is an amenable number.

8421541393 is a deficient number, since it is larger than the sum of its proper divisors (46528035).

8421541393 is a wasteful number, since it uses less digits than its factorization.

8421541393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46528034.

The product of its digits is 103680, while the sum is 40.

The square root of 8421541393 is about 91768.9565866366. The cubic root of 8421541393 is about 2034.5288964956.

The spelling of 8421541393 in words is "eight billion, four hundred twenty-one million, five hundred forty-one thousand, three hundred ninety-three".