7999999613 has 2 divisors, whose sum is σ = 7999999614. Its totient is φ = 7999999612.

The previous prime is 7999999607. The next prime is 7999999627. The reversal of 7999999613 is 3169999997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6078229369 + 1921770244 = 77963^2 + 43838^2 .

It is a cyclic number.

It is not a de Polignac number, because 7999999613 - 2²⁴ = 7983222397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7999909613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3999999806 + 3999999807.

It is an arithmetic number, because the mean of its divisors is an integer number (3999999807).

Almost surely, 2^7999999613 is an apocalyptic number.

It is an amenable number.

7999999613 is a deficient number, since it is larger than the sum of its proper divisors (1).

7999999613 is an equidigital number, since it uses as much as digits as its factorization.

7999999613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66961566, while the sum is 71.

The square root of 7999999613 is about 89442.7169365958. The cubic root of 7999999613 is about 1999.9999677500. Note that the first 4 decimals are identical.

The spelling of 7999999613 in words is "seven billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, six hundred thirteen".