7990985191 has 8 divisors (see below), whose sum is σ = 9163725984. Its totient is φ = 6826037280.

The previous prime is 7990985159. The next prime is 7990985203. The reversal of 7990985191 is 1915890997.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 7990985191 - 2⁵ = 7990985159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7990985131) 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, 1946020 + ... + 1950121.

It is an arithmetic number, because the mean of its divisors is an integer number (1145465748).

Almost surely, 2^7990985191 is an apocalyptic number.

7990985191 is a deficient number, since it is larger than the sum of its proper divisors (1172740793).

7990985191 is a wasteful number, since it uses less digits than its factorization.

7990985191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896441.

The product of its (nonzero) digits is 1837080, while the sum is 58.

The square root of 7990985191 is about 89392.3105809443. The cubic root of 7990985191 is about 1999.2484835636.

The spelling of 7990985191 in words is "seven billion, nine hundred ninety million, nine hundred eighty-five thousand, one hundred ninety-one".