899004221 has 4 divisors (see below), whose sum is σ = 902422752. Its totient is φ = 895585692.

The previous prime is 899004199. The next prime is 899004233. The reversal of 899004221 is 122400998.

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 a de Polignac number, because none of the positive numbers 2^k-899004221 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 (899001221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1708871 + ... + 1709396.

It is an arithmetic number, because the mean of its divisors is an integer number (225605688).

Almost surely, 2^899004221 is an apocalyptic number.

It is an amenable number.

899004221 is a deficient number, since it is larger than the sum of its proper divisors (3418531).

899004221 is a wasteful number, since it uses less digits than its factorization.

899004221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418530.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 899004221 is about 29983.3990901632. The cubic root of 899004221 is about 965.1331739211.

The spelling of 899004221 in words is "eight hundred ninety-nine million, four thousand, two hundred twenty-one".