990238049 has 4 divisors (see below), whose sum is σ = 1048487364. Its totient is φ = 931988736.

The previous prime is 990238043. The next prime is 990238087. The reversal of 990238049 is 940832099.

990238049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 769507600 + 220730449 = 27740^2 + 14857^2 .

It is a cyclic number.

It is not a de Polignac number, because 990238049 - 2⁸ = 990237793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990238043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29124632 + ... + 29124665.

It is an arithmetic number, because the mean of its divisors is an integer number (262121841).

Almost surely, 2^990238049 is an apocalyptic number.

It is an amenable number.

990238049 is a deficient number, since it is larger than the sum of its proper divisors (58249315).

990238049 is a wasteful number, since it uses less digits than its factorization.

990238049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58249314.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 990238049 is about 31468.0480646639. The cubic root of 990238049 is about 996.7353701230.

The spelling of 990238049 in words is "nine hundred ninety million, two hundred thirty-eight thousand, forty-nine".