898645491 has 12 divisors (see below), whose sum is σ = 1299623832. Its totient is φ = 598367616.

The previous prime is 898645487. The next prime is 898645493. The reversal of 898645491 is 194546898.

898645491 is a `hidden beast` number, since 8 + 98 + 6 + 4 + 549 + 1 = 666.

It is not a de Polignac number, because 898645491 - 2² = 898645487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (898645493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52926 + ... + 67811.

It is an arithmetic number, because the mean of its divisors is an integer number (108301986).

Almost surely, 2^898645491 is an apocalyptic number.

898645491 is a deficient number, since it is larger than the sum of its proper divisors (400978341).

898645491 is a wasteful number, since it uses less digits than its factorization.

898645491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121570 (or 121567 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 898645491 is about 29977.4163496456. The cubic root of 898645491 is about 965.0047843553.

The spelling of 898645491 in words is "eight hundred ninety-eight million, six hundred forty-five thousand, four hundred ninety-one".