898423817 has 2 divisors, whose sum is σ = 898423818. Its totient is φ = 898423816.

The previous prime is 898423777. The next prime is 898423831. The reversal of 898423817 is 718324898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874030096 + 24393721 = 29564^2 + 4939^2 .

It is a cyclic number.

It is not a de Polignac number, because 898423817 - 2¹⁶ = 898358281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (898423117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 449211908 + 449211909.

It is an arithmetic number, because the mean of its divisors is an integer number (449211909).

Almost surely, 2^898423817 is an apocalyptic number.

It is an amenable number.

898423817 is a deficient number, since it is larger than the sum of its proper divisors (1).

898423817 is an equidigital number, since it uses as much as digits as its factorization.

898423817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 50.

The square root of 898423817 is about 29973.7187716172. The cubic root of 898423817 is about 964.9254300884.

The spelling of 898423817 in words is "eight hundred ninety-eight million, four hundred twenty-three thousand, eight hundred seventeen".