898449557 has 2 divisors, whose sum is σ = 898449558. Its totient is φ = 898449556.

The previous prime is 898449527. The next prime is 898449569. The reversal of 898449557 is 755944898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 770284516 + 128165041 = 27754^2 + 11321^2 .

It is a cyclic number.

It is not a de Polignac number, because 898449557 - 2⁸ = 898449301 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 898449496 and 898449505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (898449527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449224778 + 449224779.

It is an arithmetic number, because the mean of its divisors is an integer number (449224779).

Almost surely, 2^898449557 is an apocalyptic number.

It is an amenable number.

898449557 is a deficient number, since it is larger than the sum of its proper divisors (1).

898449557 is an equidigital number, since it uses as much as digits as its factorization.

898449557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 59.

The square root of 898449557 is about 29974.1481446930. The cubic root of 898449557 is about 964.9346450947.

The spelling of 898449557 in words is "eight hundred ninety-eight million, four hundred forty-nine thousand, five hundred fifty-seven".