9897421624 has 16 divisors (see below), whose sum is σ = 19649293200. Its totient is φ = 4657610112.

The previous prime is 9897421609. The next prime is 9897421627. The reversal of 9897421624 is 4261247989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9897421627) 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, 36387444 + ... + 36387715.

It is an arithmetic number, because the mean of its divisors is an integer number (1228080825).

Almost surely, 2^9897421624 is an apocalyptic number.

It is an amenable number.

9897421624 is a deficient number, since it is larger than the sum of its proper divisors (9751871576).

9897421624 is a wasteful number, since it uses less digits than its factorization.

9897421624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72775182 (or 72775178 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 52.

The square root of 9897421624 is about 99485.7860400168. The cubic root of 9897421624 is about 2147.0427432661.

The spelling of 9897421624 in words is "nine billion, eight hundred ninety-seven million, four hundred twenty-one thousand, six hundred twenty-four".