7857129339 has 48 divisors (see below), whose sum is σ = 11885134144. Its totient is φ = 4996857600.

The previous prime is 7857129331. The next prime is 7857129353. The reversal of 7857129339 is 9339217587.

7857129339 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 7857129339 - 2³ = 7857129331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7857129331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12451554 + ... + 12452184.

Almost surely, 2^7857129339 is an apocalyptic number.

7857129339 is a deficient number, since it is larger than the sum of its proper divisors (4028004805).

7857129339 is a wasteful number, since it uses less digits than its factorization.

7857129339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 1345 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 7857129339 is about 88640.4497901494. The cubic root of 7857129339 is about 1988.0225248181.

The spelling of 7857129339 in words is "seven billion, eight hundred fifty-seven million, one hundred twenty-nine thousand, three hundred thirty-nine".