9993773971 has 2 divisors, whose sum is σ = 9993773972. Its totient is φ = 9993773970.

The previous prime is 9993773947. The next prime is 9993774031. The reversal of 9993773971 is 1793773999.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1793773999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9993773971 - 2¹³ = 9993765779 is a prime.

It is not a weakly prime, because it can be changed into another prime (9993773071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996886985 + 4996886986.

It is an arithmetic number, because the mean of its divisors is an integer number (4996886986).

Almost surely, 2^9993773971 is an apocalyptic number.

9993773971 is a deficient number, since it is larger than the sum of its proper divisors (1).

9993773971 is an equidigital number, since it uses as much as digits as its factorization.

9993773971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20253807, while the sum is 64.

The square root of 9993773971 is about 99968.8650080614. The cubic root of 9993773971 is about 2153.9874781119.

The spelling of 9993773971 in words is "nine billion, nine hundred ninety-three million, seven hundred seventy-three thousand, nine hundred seventy-one".