898921633 has 2 divisors, whose sum is σ = 898921634. Its totient is φ = 898921632.

The previous prime is 898921609. The next prime is 898921637. The reversal of 898921633 is 336129898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 782432784 + 116488849 = 27972^2 + 10793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-898921633 is a prime.

It is not a weakly prime, because it can be changed into another prime (898921637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449460816 + 449460817.

It is an arithmetic number, because the mean of its divisors is an integer number (449460817).

Almost surely, 2^898921633 is an apocalyptic number.

It is an amenable number.

898921633 is a deficient number, since it is larger than the sum of its proper divisors (1).

898921633 is an equidigital number, since it uses as much as digits as its factorization.

898921633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 49.

The square root of 898921633 is about 29982.0218297566. The cubic root of 898921633 is about 965.1036186800.

The spelling of 898921633 in words is "eight hundred ninety-eight million, nine hundred twenty-one thousand, six hundred thirty-three".