885089921 has 4 divisors (see below), whose sum is σ = 937154052. Its totient is φ = 833025792.

The previous prime is 885089911. The next prime is 885089923. The reversal of 885089921 is 129980588.

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 765296896 + 119793025 = 27664^2 + 10945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-885089921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 885089921.

It is not an unprimeable number, because it can be changed into a prime (885089923) 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, 26032040 + ... + 26032073.

It is an arithmetic number, because the mean of its divisors is an integer number (234288513).

Almost surely, 2^885089921 is an apocalyptic number.

It is an amenable number.

885089921 is a deficient number, since it is larger than the sum of its proper divisors (52064131).

885089921 is a wasteful number, since it uses less digits than its factorization.

885089921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52064130.

The product of its (nonzero) digits is 414720, while the sum is 50.

The square root of 885089921 is about 29750.4608535733. The cubic root of 885089921 is about 960.1279925555.

The spelling of 885089921 in words is "eight hundred eighty-five million, eighty-nine thousand, nine hundred twenty-one".