990497 has 2 divisors, whose sum is σ = 990498. Its totient is φ = 990496.

The previous prime is 990487. The next prime is 990503. The reversal of 990497 is 794099.

990497 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., 625681 + 364816 = 791^2 + 604^2 .

It is a cyclic number.

It is not a de Polignac number, because 990497 - 2¹⁶ = 924961 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 990497.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 990497.

It is not a weakly prime, because it can be changed into another prime (990487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495248 + 495249.

It is an arithmetic number, because the mean of its divisors is an integer number (495249).

2⁹⁹⁰⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

990497 is a deficient number, since it is larger than the sum of its proper divisors (1).

990497 is an equidigital number, since it uses as much as digits as its factorization.

990497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 990497 is about 995.2371576665. The cubic root of 990497 is about 99.6822245909.

It can be divided in two parts, 9904 and 97, that added together give a palindrome (10001).

The spelling of 990497 in words is "nine hundred ninety thousand, four hundred ninety-seven".