9971938365 has 16 divisors (see below), whose sum is σ = 15964735488. Its totient is φ = 5315155776.

The previous prime is 9971938343. The next prime is 9971938381. The reversal of 9971938365 is 5638391799.

It is not a de Polignac number, because 9971938365 - 2¹³ = 9971930173 is a prime.

It is a super-3 number, since 3×9971938365³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9971938299 and 9971938308.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 174934 + ... + 224823.

It is an arithmetic number, because the mean of its divisors is an integer number (997795968).

Almost surely, 2^9971938365 is an apocalyptic number.

It is an amenable number.

9971938365 is a deficient number, since it is larger than the sum of its proper divisors (5992797123).

9971938365 is a wasteful number, since it uses less digits than its factorization.

9971938365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401428.

The product of its digits is 11022480, while the sum is 60.

The square root of 9971938365 is about 99859.5932547294. The cubic root of 9971938365 is about 2152.4175700674.

The spelling of 9971938365 in words is "nine billion, nine hundred seventy-one million, nine hundred thirty-eight thousand, three hundred sixty-five".