990999793337 has 2 divisors, whose sum is σ = 990999793338. Its totient is φ = 990999793336.

The previous prime is 990999793291. The next prime is 990999793361. The reversal of 990999793337 is 733397999099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 863457242176 + 127542551161 = 929224^2 + 357131^2 .

It is a cyclic number.

It is not a de Polignac number, because 990999793337 - 2²⁶ = 990932684473 is a prime.

It is not a weakly prime, because it can be changed into another prime (990999793387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495499896668 + 495499896669.

It is an arithmetic number, because the mean of its divisors is an integer number (495499896669).

Almost surely, 2^990999793337 is an apocalyptic number.

It is an amenable number.

990999793337 is a deficient number, since it is larger than the sum of its proper divisors (1).

990999793337 is an equidigital number, since it uses as much as digits as its factorization.

990999793337 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 703096443, while the sum is 77.

The spelling of 990999793337 in words is "nine hundred ninety billion, nine hundred ninety-nine million, seven hundred ninety-three thousand, three hundred thirty-seven".