7991129214 has 12 divisors (see below), whose sum is σ = 17314113336. Its totient is φ = 2663709732.

The previous prime is 7991129197. The next prime is 7991129227. The reversal of 7991129214 is 4129211997.

It is a happy number.

It is a super-2 number, since 2×7991129214² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 7991129214.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 221975794 + ... + 221975829.

It is an arithmetic number, because the mean of its divisors is an integer number (1442842778).

Almost surely, 2^7991129214 is an apocalyptic number.

7991129214 is an abundant number, since it is smaller than the sum of its proper divisors (9322984122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7991129214 is a wasteful number, since it uses less digits than its factorization.

7991129214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443951631 (or 443951628 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 7991129214 is about 89393.1161443654. The cubic root of 7991129214 is about 1999.2604944328.

The spelling of 7991129214 in words is "seven billion, nine hundred ninety-one million, one hundred twenty-nine thousand, two hundred fourteen".