998962910639 has 2 divisors, whose sum is σ = 998962910640. Its totient is φ = 998962910638.

The previous prime is 998962910633. The next prime is 998962910641. The reversal of 998962910639 is 936019269899.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998962910639 is a prime.

Together with 998962910641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998962910633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499481455319 + 499481455320.

It is an arithmetic number, because the mean of its divisors is an integer number (499481455320).

Almost surely, 2^998962910639 is an apocalyptic number.

998962910639 is a deficient number, since it is larger than the sum of its proper divisors (1).

998962910639 is an equidigital number, since it uses as much as digits as its factorization.

998962910639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 102036672, while the sum is 71.

The spelling of 998962910639 in words is "nine hundred ninety-eight billion, nine hundred sixty-two million, nine hundred ten thousand, six hundred thirty-nine".