990519137 has 2 divisors, whose sum is σ = 990519138. Its totient is φ = 990519136.

The previous prime is 990519121. The next prime is 990519149. The reversal of 990519137 is 731915099.

990519137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 641912896 + 348606241 = 25336^2 + 18671^2 .

It is an emirp because it is prime and its reverse (731915099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990519137 - 2⁴ = 990519121 is a prime.

It is a super-2 number, since 2×990519137² = 1962256321526449538, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (990519107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495259568 + 495259569.

It is an arithmetic number, because the mean of its divisors is an integer number (495259569).

Almost surely, 2^990519137 is an apocalyptic number.

It is an amenable number.

990519137 is a deficient number, since it is larger than the sum of its proper divisors (1).

990519137 is an equidigital number, since it uses as much as digits as its factorization.

990519137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76545, while the sum is 44.

The square root of 990519137 is about 31472.5139923712. The cubic root of 990519137 is about 996.8296719752.

The spelling of 990519137 in words is "nine hundred ninety million, five hundred nineteen thousand, one hundred thirty-seven".