8309993471 has 24 divisors (see below), whose sum is σ = 9436607280. Its totient is φ = 7304484096.

The previous prime is 8309993459. The next prime is 8309993477. The reversal of 8309993471 is 1743999038.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-8309993471 is a prime.

It is a super-3 number, since 3×8309993471³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8309993477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346160 + ... + 369386.

It is an arithmetic number, because the mean of its divisors is an integer number (393191970).

Almost surely, 2^8309993471 is an apocalyptic number.

8309993471 is a deficient number, since it is larger than the sum of its proper divisors (1126613809).

8309993471 is a wasteful number, since it uses less digits than its factorization.

8309993471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23355 (or 23342 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 8309993471 is about 91159.1655896433. The cubic root of 8309993471 is about 2025.5061252599.

The spelling of 8309993471 in words is "eight billion, three hundred nine million, nine hundred ninety-three thousand, four hundred seventy-one".