886561021 has 4 divisors (see below), whose sum is σ = 890762944. Its totient is φ = 882359100.

The previous prime is 886561003. The next prime is 886561061. The reversal of 886561021 is 120165688.

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 886561021 - 2⁹ = 886560509 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 (886561061) 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, 2100645 + ... + 2101066.

It is an arithmetic number, because the mean of its divisors is an integer number (222690736).

Almost surely, 2^886561021 is an apocalyptic number.

It is an amenable number.

886561021 is a deficient number, since it is larger than the sum of its proper divisors (4201923).

886561021 is a wasteful number, since it uses less digits than its factorization.

886561021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4201922.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 886561021 is about 29775.1745754748. The cubic root of 886561021 is about 960.6596381511.

The spelling of 886561021 in words is "eight hundred eighty-six million, five hundred sixty-one thousand, twenty-one".