7849357987697 has 2 divisors, whose sum is σ = 7849357987698. Its totient is φ = 7849357987696.

The previous prime is 7849357987637. The next prime is 7849357987721. The reversal of 7849357987697 is 7967897539487.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4645744849201 + 3203613138496 = 2155399^2 + 1789864^2 .

It is a cyclic number.

It is not a de Polignac number, because 7849357987697 - 2⁸ = 7849357987441 is a prime.

It is a super-2 number, since 2×7849357987697² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7849357987637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3924678993848 + 3924678993849.

It is an arithmetic number, because the mean of its divisors is an integer number (3924678993849).

Almost surely, 2^{7849357987697} is an apocalyptic number.

It is an amenable number.

7849357987697 is a deficient number, since it is larger than the sum of its proper divisors (1).

7849357987697 is an equidigital number, since it uses as much as digits as its factorization.

7849357987697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40327580160, while the sum is 89.

The spelling of 7849357987697 in words is "seven trillion, eight hundred forty-nine billion, three hundred fifty-seven million, nine hundred eighty-seven thousand, six hundred ninety-seven".