8071990917 has 8 divisors (see below), whose sum is σ = 11012949024. Its totient is φ = 5256180048.

The previous prime is 8071990879. The next prime is 8071990943. The reversal of 8071990917 is 7190991708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8071990917 - 2¹² = 8071986821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8071990917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8071990957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31286658 + ... + 31286915.

It is an arithmetic number, because the mean of its divisors is an integer number (1376618628).

Almost surely, 2^8071990917 is an apocalyptic number.

It is an amenable number.

8071990917 is a deficient number, since it is larger than the sum of its proper divisors (2940958107).

8071990917 is a wasteful number, since it uses less digits than its factorization.

8071990917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62573619.

The product of its (nonzero) digits is 285768, while the sum is 51.

The square root of 8071990917 is about 89844.2592322960. The cubic root of 8071990917 is about 2005.9813370543.

The spelling of 8071990917 in words is "eight billion, seventy-one million, nine hundred ninety thousand, nine hundred seventeen".