990035647 has 4 divisors (see below), whose sum is σ = 1048273056. Its totient is φ = 931798240.

The previous prime is 990035609. The next prime is 990035671. The reversal of 990035647 is 746530099.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990035647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990035687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29118679 + ... + 29118712.

It is an arithmetic number, because the mean of its divisors is an integer number (262068264).

Almost surely, 2^990035647 is an apocalyptic number.

990035647 is a deficient number, since it is larger than the sum of its proper divisors (58237409).

990035647 is a wasteful number, since it uses less digits than its factorization.

990035647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58237408.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 990035647 is about 31464.8319080207. The cubic root of 990035647 is about 996.6674554840.

The spelling of 990035647 in words is "nine hundred ninety million, thirty-five thousand, six hundred forty-seven".