7857241313 has 4 divisors (see below), whose sum is σ = 7900651668. Its totient is φ = 7813830960.

The previous prime is 7857241303. The next prime is 7857241333. The reversal of 7857241313 is 3131427587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3131427587 = 19763 ⋅158449.

It can be written as a sum of positive squares in 2 ways, for example, as 268566544 + 7588674769 = 16388^2 + 87113^2 .

It is a cyclic number.

It is not a de Polignac number, because 7857241313 - 2⁴ = 7857241297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7857241303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21704906 + ... + 21705267.

It is an arithmetic number, because the mean of its divisors is an integer number (1975162917).

Almost surely, 2^7857241313 is an apocalyptic number.

It is an amenable number.

7857241313 is a deficient number, since it is larger than the sum of its proper divisors (43410355).

7857241313 is a wasteful number, since it uses less digits than its factorization.

7857241313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43410354.

The product of its digits is 141120, while the sum is 41.

The square root of 7857241313 is about 88641.0814069865. The cubic root of 7857241313 is about 1988.0319687158.

The spelling of 7857241313 in words is "seven billion, eight hundred fifty-seven million, two hundred forty-one thousand, three hundred thirteen".