9621386973 has 24 divisors (see below), whose sum is σ = 15215749536. Its totient is φ = 5810076000.

The previous prime is 9621386941. The next prime is 9621386977. The reversal of 9621386973 is 3796831269.

9621386973 is a `hidden beast` number, since 9 + 621 + 3 + 8 + 6 + 9 + 7 + 3 = 666.

It is not a de Polignac number, because 9621386973 - 2⁵ = 9621386941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9621386977) 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, 148003 + ... + 202848.

It is an arithmetic number, because the mean of its divisors is an integer number (633989564).

Almost surely, 2^9621386973 is an apocalyptic number.

It is an amenable number.

9621386973 is a deficient number, since it is larger than the sum of its proper divisors (5594362563).

9621386973 is a wasteful number, since it uses less digits than its factorization.

9621386973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351145 (or 351142 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 9621386973 is about 98088.6689327570. The cubic root of 9621386973 is about 2126.8942351572.

The spelling of 9621386973 in words is "nine billion, six hundred twenty-one million, three hundred eighty-six thousand, nine hundred seventy-three".