990475853 has 2 divisors, whose sum is σ = 990475854. Its totient is φ = 990475852.

The previous prime is 990475813. The next prime is 990475867. The reversal of 990475853 is 358574099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 770784169 + 219691684 = 27763^2 + 14822^2 .

It is a cyclic number.

It is not a de Polignac number, because 990475853 - 2⁶ = 990475789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990475813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495237926 + 495237927.

It is an arithmetic number, because the mean of its divisors is an integer number (495237927).

Almost surely, 2^990475853 is an apocalyptic number.

It is an amenable number.

990475853 is a deficient number, since it is larger than the sum of its proper divisors (1).

990475853 is an equidigital number, since it uses as much as digits as its factorization.

990475853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 990475853 is about 31471.8263372179. The cubic root of 990475853 is about 996.8151518438.

The spelling of 990475853 in words is "nine hundred ninety million, four hundred seventy-five thousand, eight hundred fifty-three".