990254497 has 2 divisors, whose sum is σ = 990254498. Its totient is φ = 990254496.

The previous prime is 990254459. The next prime is 990254533. The reversal of 990254497 is 794452099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 909685921 + 80568576 = 30161^2 + 8976^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990254497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 990254497.

It is not a weakly prime, because it can be changed into another prime (990264497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495127248 + 495127249.

It is an arithmetic number, because the mean of its divisors is an integer number (495127249).

Almost surely, 2^990254497 is an apocalyptic number.

It is an amenable number.

990254497 is a deficient number, since it is larger than the sum of its proper divisors (1).

990254497 is an equidigital number, since it uses as much as digits as its factorization.

990254497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 990254497 is about 31468.3094080378. The cubic root of 990254497 is about 996.7408887330.

The spelling of 990254497 in words is "nine hundred ninety million, two hundred fifty-four thousand, four hundred ninety-seven".