898221901 has 4 divisors (see below), whose sum is σ = 929195100. Its totient is φ = 867248704.

The previous prime is 898221893. The next prime is 898221913. The reversal of 898221901 is 109122898.

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 527620900 + 370601001 = 22970^2 + 19251^2 .

It is a cyclic number.

It is not a de Polignac number, because 898221901 - 2³ = 898221893 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 (898221101) 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, 15486556 + ... + 15486613.

It is an arithmetic number, because the mean of its divisors is an integer number (232298775).

Almost surely, 2^898221901 is an apocalyptic number.

It is an amenable number.

898221901 is a deficient number, since it is larger than the sum of its proper divisors (30973199).

898221901 is a wasteful number, since it uses less digits than its factorization.

898221901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30973198.

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 898221901 is about 29970.3503649857. The cubic root of 898221901 is about 964.8531373771.

The spelling of 898221901 in words is "eight hundred ninety-eight million, two hundred twenty-one thousand, nine hundred one".