7938097215 has 64 divisors (see below), whose sum is σ = 13664941056. Its totient is φ = 3920873472.

The previous prime is 7938097213. The next prime is 7938097231. The reversal of 7938097215 is 5127908397.

7938097215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 89096²-1.

It is not a de Polignac number, because 7938097215 - 2¹ = 7938097213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7938097213) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 4542972 + ... + 4544718.

It is an arithmetic number, because the mean of its divisors is an integer number (213514704).

Almost surely, 2^7938097215 is an apocalyptic number.

7938097215 is a deficient number, since it is larger than the sum of its proper divisors (5726843841).

7938097215 is a wasteful number, since it uses less digits than its factorization.

7938097215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2048.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 7938097215 is about 89095.9999943881. Note that the first 5 decimals coincide. The cubic root of 7938097215 is about 1994.8280716907.

The spelling of 7938097215 in words is "seven billion, nine hundred thirty-eight million, ninety-seven thousand, two hundred fifteen".