998450617 has 2 divisors, whose sum is σ = 998450618. Its totient is φ = 998450616.

The previous prime is 998450591. The next prime is 998450653. The reversal of 998450617 is 716054899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 939790336 + 58660281 = 30656^2 + 7659^2 .

It is a cyclic number.

It is not a de Polignac number, because 998450617 - 2²³ = 990062009 is a prime.

It is not a weakly prime, because it can be changed into another prime (998450317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499225308 + 499225309.

It is an arithmetic number, because the mean of its divisors is an integer number (499225309).

Almost surely, 2^998450617 is an apocalyptic number.

It is an amenable number.

998450617 is a deficient number, since it is larger than the sum of its proper divisors (1).

998450617 is an equidigital number, since it uses as much as digits as its factorization.

998450617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 998450617 is about 31598.2692089298. The cubic root of 998450617 is about 999.4832720382.

The spelling of 998450617 in words is "nine hundred ninety-eight million, four hundred fifty thousand, six hundred seventeen".