998329735631 has 2 divisors, whose sum is σ = 998329735632. Its totient is φ = 998329735630.

The previous prime is 998329735609. The next prime is 998329735679. The reversal of 998329735631 is 136537923899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998329735631 - 2¹⁰ = 998329734607 is a prime.

It is a super-2 number, since 2×998329735631² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998329735331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499164867815 + 499164867816.

It is an arithmetic number, because the mean of its divisors is an integer number (499164867816).

Almost surely, 2^998329735631 is an apocalyptic number.

998329735631 is a deficient number, since it is larger than the sum of its proper divisors (1).

998329735631 is an equidigital number, since it uses as much as digits as its factorization.

998329735631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66134880, while the sum is 65.

The spelling of 998329735631 in words is "nine hundred ninety-eight billion, three hundred twenty-nine million, seven hundred thirty-five thousand, six hundred thirty-one".