9971438213 has 32 divisors (see below), whose sum is σ = 11932686720. Its totient is φ = 8225280000.

The previous prime is 9971438189. The next prime is 9971438227. The reversal of 9971438213 is 3128341799.

It is not a de Polignac number, because 9971438213 - 2¹² = 9971434117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9971438233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6512258 + ... + 6513788.

It is an arithmetic number, because the mean of its divisors is an integer number (372896460).

Almost surely, 2^9971438213 is an apocalyptic number.

It is an amenable number.

9971438213 is a deficient number, since it is larger than the sum of its proper divisors (1961248507).

9971438213 is a wasteful number, since it uses less digits than its factorization.

9971438213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789.

The product of its digits is 326592, while the sum is 47.

The square root of 9971438213 is about 99857.0889471549. The cubic root of 9971438213 is about 2152.3815839528.

The spelling of 9971438213 in words is "nine billion, nine hundred seventy-one million, four hundred thirty-eight thousand, two hundred thirteen".