990643359119 has 2 divisors, whose sum is σ = 990643359120. Its totient is φ = 990643359118.

The previous prime is 990643359103. The next prime is 990643359161. The reversal of 990643359119 is 911953346099.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 990643359119 - 2⁴ = 990643359103 is a prime.

It is a super-2 number, since 2×990643359119² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990643359169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495321679559 + 495321679560.

It is an arithmetic number, because the mean of its divisors is an integer number (495321679560).

Almost surely, 2^990643359119 is an apocalyptic number.

990643359119 is a deficient number, since it is larger than the sum of its proper divisors (1).

990643359119 is an equidigital number, since it uses as much as digits as its factorization.

990643359119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7085880, while the sum is 59.

The spelling of 990643359119 in words is "nine hundred ninety billion, six hundred forty-three million, three hundred fifty-nine thousand, one hundred nineteen".