8921278533 has 4 divisors (see below), whose sum is σ = 11895038048. Its totient is φ = 5947519020.

The previous prime is 8921278523. The next prime is 8921278573. The reversal of 8921278533 is 3358721298.

It is a happy number.

8921278533 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 not a de Polignac number, because 8921278533 - 2¹⁶ = 8921212997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8921278523) 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, 1486879753 + ... + 1486879758.

It is an arithmetic number, because the mean of its divisors is an integer number (2973759512).

Almost surely, 2^8921278533 is an apocalyptic number.

It is an amenable number.

8921278533 is a deficient number, since it is larger than the sum of its proper divisors (2973759515).

8921278533 is a wasteful number, since it uses less digits than its factorization.

8921278533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2973759514.

The product of its digits is 725760, while the sum is 48.

The square root of 8921278533 is about 94452.5199928514. The cubic root of 8921278533 is about 2074.0013413217.

The spelling of 8921278533 in words is "eight billion, nine hundred twenty-one million, two hundred seventy-eight thousand, five hundred thirty-three".