990998547 has 16 divisors (see below), whose sum is σ = 1647374592. Its totient is φ = 514804320.

The previous prime is 990998537. The next prime is 990998549. The reversal of 990998547 is 745899099.

It is a happy number.

It is not a de Polignac number, because 990998547 - 2⁸ = 990998291 is a prime.

It is a super-2 number, since 2×990998547² = 1964156240312222418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (990998549) 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 in 15 ways as a sum of consecutive naturals, for example, 2144788 + ... + 2145249.

It is an arithmetic number, because the mean of its divisors is an integer number (102960912).

Almost surely, 2^990998547 is an apocalyptic number.

990998547 is a deficient number, since it is larger than the sum of its proper divisors (656376045).

990998547 is a wasteful number, since it uses less digits than its factorization.

990998547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290058.

The product of its (nonzero) digits is 7348320, while the sum is 60.

The square root of 990998547 is about 31480.1293993529. The cubic root of 990998547 is about 996.9904674667.

The spelling of 990998547 in words is "nine hundred ninety million, nine hundred ninety-eight thousand, five hundred forty-seven".