7971297250 has 32 divisors (see below), whose sum is σ = 17054024832. Its totient is φ = 2733015600.

The previous prime is 7971297241. The next prime is 7971297277. The reversal of 7971297250 is 527921797.

It is a junction number, because it is equal to n+sod(n) for n = 7971297194 and 7971297203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2275764 + ... + 2279263.

It is an arithmetic number, because the mean of its divisors is an integer number (532938276).

Almost surely, 2^7971297250 is an apocalyptic number.

7971297250 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

7971297250 is an abundant number, since it is smaller than the sum of its proper divisors (9082727582).

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

7971297250 is a wasteful number, since it uses less digits than its factorization.

7971297250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4555051 (or 4555041 counting only the distinct ones).

The product of its (nonzero) digits is 555660, while the sum is 49.

The square root of 7971297250 is about 89282.1216705786. The cubic root of 7971297250 is about 1997.6052378683.

The spelling of 7971297250 in words is "seven billion, nine hundred seventy-one million, two hundred ninety-seven thousand, two hundred fifty".