9997050217 has 32 divisors (see below), whose sum is σ = 12958444800. Its totient is φ = 7642776960.

The previous prime is 9997050197. The next prime is 9997050229. The reversal of 9997050217 is 7120507999.

It is not a de Polignac number, because 9997050217 - 2¹⁵ = 9997017449 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (9997054217) 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 31 ways as a sum of consecutive naturals, for example, 174973 + ... + 224965.

It is an arithmetic number, because the mean of its divisors is an integer number (404951400).

Almost surely, 2^9997050217 is an apocalyptic number.

9997050217 is the 49993-rd decagonal number.

It is an amenable number.

9997050217 is a deficient number, since it is larger than the sum of its proper divisors (2961394583).

9997050217 is a wasteful number, since it uses less digits than its factorization.

9997050217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50078 (or 50064 counting only the distinct ones).

The product of its (nonzero) digits is 357210, while the sum is 49.

The square root of 9997050217 is about 99985.2499971871. The cubic root of 9997050217 is about 2154.2228320386. Note that the first 3 decimals are identical.

The spelling of 9997050217 in words is "nine billion, nine hundred ninety-seven million, fifty thousand, two hundred seventeen".