898430857 has 2 divisors, whose sum is σ = 898430858. Its totient is φ = 898430856.

The previous prime is 898430851. The next prime is 898430861. The reversal of 898430857 is 758034898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 618069321 + 280361536 = 24861^2 + 16744^2 .

It is a cyclic number.

It is not a de Polignac number, because 898430857 - 2³ = 898430849 is a prime.

It is a super-3 number, since 3×898430857³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (898430851) 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 as a sum of consecutive naturals, namely, 449215428 + 449215429.

It is an arithmetic number, because the mean of its divisors is an integer number (449215429).

Almost surely, 2^898430857 is an apocalyptic number.

It is an amenable number.

898430857 is a deficient number, since it is larger than the sum of its proper divisors (1).

898430857 is an equidigital number, since it uses as much as digits as its factorization.

898430857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The square root of 898430857 is about 29973.8362075995. The cubic root of 898430857 is about 964.9279504495.

The spelling of 898430857 in words is "eight hundred ninety-eight million, four hundred thirty thousand, eight hundred fifty-seven".