998641718383 has 2 divisors, whose sum is σ = 998641718384. Its totient is φ = 998641718382.

The previous prime is 998641718377. The next prime is 998641718401. The reversal of 998641718383 is 383817146899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998641718383 - 2¹³ = 998641710191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998641718323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499320859191 + 499320859192.

It is an arithmetic number, because the mean of its divisors is an integer number (499320859192).

Almost surely, 2^998641718383 is an apocalyptic number.

998641718383 is a deficient number, since it is larger than the sum of its proper divisors (1).

998641718383 is an equidigital number, since it uses as much as digits as its factorization.

998641718383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62705664, while the sum is 67.

The spelling of 998641718383 in words is "nine hundred ninety-eight billion, six hundred forty-one million, seven hundred eighteen thousand, three hundred eighty-three".