898855561 has 4 divisors (see below), whose sum is σ = 898958592. Its totient is φ = 898752532.

The previous prime is 898855543. The next prime is 898855579. The reversal of 898855561 is 165558898.

898855561 is digitally balanced in base 2, 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 an interprime number because it is at equal distance from previous prime (898855543) and next prime (898855579).

It is a cyclic number.

It is not a de Polignac number, because 898855561 - 2¹¹ = 898853513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (898855361) 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, 37081 + ... + 56326.

It is an arithmetic number, because the mean of its divisors is an integer number (224739648).

Almost surely, 2^898855561 is an apocalyptic number.

It is an amenable number.

898855561 is a deficient number, since it is larger than the sum of its proper divisors (103031).

898855561 is an equidigital number, since it uses as much as digits as its factorization.

898855561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103030.

The product of its digits is 3456000, while the sum is 55.

The square root of 898855561 is about 29980.9199491944. The cubic root of 898855561 is about 965.0799726110.

The spelling of 898855561 in words is "eight hundred ninety-eight million, eight hundred fifty-five thousand, five hundred sixty-one".