9904443971 has 2 divisors, whose sum is σ = 9904443972. Its totient is φ = 9904443970.

The previous prime is 9904443949. The next prime is 9904443973. The reversal of 9904443971 is 1793444099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9904443971 - 2³⁰ = 8830702147 is a prime.

Together with 9904443973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9904443973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4952221985 + 4952221986.

It is an arithmetic number, because the mean of its divisors is an integer number (4952221986).

Almost surely, 2^9904443971 is an apocalyptic number.

9904443971 is a deficient number, since it is larger than the sum of its proper divisors (1).

9904443971 is an equidigital number, since it uses as much as digits as its factorization.

9904443971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 9904443971 is about 99521.0729996416. The cubic root of 9904443971 is about 2147.5504079659.

The spelling of 9904443971 in words is "nine billion, nine hundred four million, four hundred forty-three thousand, nine hundred seventy-one".