898809689 has 2 divisors, whose sum is σ = 898809690. Its totient is φ = 898809688.

The previous prime is 898809679. The next prime is 898809697. The reversal of 898809689 is 986908898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463670089 + 435139600 = 21533^2 + 20860^2 .

It is a cyclic number.

It is not a de Polignac number, because 898809689 - 2¹⁶ = 898744153 is a prime.

It is not a weakly prime, because it can be changed into another prime (898809679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449404844 + 449404845.

It is an arithmetic number, because the mean of its divisors is an integer number (449404845).

Almost surely, 2^898809689 is an apocalyptic number.

It is an amenable number.

898809689 is a deficient number, since it is larger than the sum of its proper divisors (1).

898809689 is an equidigital number, since it uses as much as digits as its factorization.

898809689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17915904, while the sum is 65.

The square root of 898809689 is about 29980.1549195464. The cubic root of 898809689 is about 965.0635551043.

The spelling of 898809689 in words is "eight hundred ninety-eight million, eight hundred nine thousand, six hundred eighty-nine".