898446721 has 2 divisors, whose sum is σ = 898446722. Its totient is φ = 898446720.

The previous prime is 898446667. The next prime is 898446727. The reversal of 898446721 is 127644898.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 791634496 + 106812225 = 28136^2 + 10335^2 .

It is a cyclic number.

It is not a de Polignac number, because 898446721 - 2¹³ = 898438529 is a prime.

It is not a weakly prime, because it can be changed into another prime (898446727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449223360 + 449223361.

It is an arithmetic number, because the mean of its divisors is an integer number (449223361).

Almost surely, 2^898446721 is an apocalyptic number.

It is an amenable number.

898446721 is a deficient number, since it is larger than the sum of its proper divisors (1).

898446721 is an equidigital number, since it uses as much as digits as its factorization.

898446721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 49.

The square root of 898446721 is about 29974.1008372228. The cubic root of 898446721 is about 964.9336298058.

The spelling of 898446721 in words is "eight hundred ninety-eight million, four hundred forty-six thousand, seven hundred twenty-one".