9393947871 has 64 divisors (see below), whose sum is σ = 16882360320. Its totient is φ = 4498104960.

The previous prime is 9393947867. The next prime is 9393947897. The reversal of 9393947871 is 1787493939.

It is a happy number.

It is not a de Polignac number, because 9393947871 - 2² = 9393947867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9393947821) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 133470 + ... + 191316.

It is an arithmetic number, because the mean of its divisors is an integer number (263786880).

Almost surely, 2^9393947871 is an apocalyptic number.

9393947871 is a deficient number, since it is larger than the sum of its proper divisors (7488412449).

9393947871 is a wasteful number, since it uses less digits than its factorization.

9393947871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57924.

The product of its digits is 10287648, while the sum is 60.

The square root of 9393947871 is about 96922.3806507042. The cubic root of 9393947871 is about 2110.0012631485.

The spelling of 9393947871 in words is "nine billion, three hundred ninety-three million, nine hundred forty-seven thousand, eight hundred seventy-one".