9897999950 has 48 divisors (see below), whose sum is σ = 18754799616. Its totient is φ = 3885621600.

The previous prime is 9897999901. The next prime is 9897999959. The reversal of 9897999950 is 599997989.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9897999959) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 785399 + ... + 797901.

It is an arithmetic number, because the mean of its divisors is an integer number (390724992).

Almost surely, 2^9897999950 is an apocalyptic number.

9897999950 is a deficient number, since it is larger than the sum of its proper divisors (8856799666).

9897999950 is a wasteful number, since it uses less digits than its factorization.

9897999950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12809 (or 12804 counting only the distinct ones).

The product of its (nonzero) digits is 148803480, while the sum is 74.

The square root of 9897999950 is about 99488.6925735784. The cubic root of 9897999950 is about 2147.0845611087.

The spelling of 9897999950 in words is "nine billion, eight hundred ninety-seven million, nine hundred ninety-nine thousand, nine hundred fifty".