8857739221 has 4 divisors (see below), whose sum is σ = 8989944352. Its totient is φ = 8725534092.

The previous prime is 8857739201. The next prime is 8857739237. The reversal of 8857739221 is 1229377588.

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 8857739221 - 2¹⁵ = 8857706453 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 (8857739201) 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, 66102465 + ... + 66102598.

It is an arithmetic number, because the mean of its divisors is an integer number (2247486088).

Almost surely, 2^8857739221 is an apocalyptic number.

It is an amenable number.

8857739221 is a deficient number, since it is larger than the sum of its proper divisors (132205131).

8857739221 is a wasteful number, since it uses less digits than its factorization.

8857739221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132205130.

The product of its digits is 1693440, while the sum is 52.

The square root of 8857739221 is about 94115.5631179031. The cubic root of 8857739221 is about 2069.0657737528.

The spelling of 8857739221 in words is "eight billion, eight hundred fifty-seven million, seven hundred thirty-nine thousand, two hundred twenty-one".