7919061613 has 2 divisors, whose sum is σ = 7919061614. Its totient is φ = 7919061612.

The previous prime is 7919061607. The next prime is 7919061617. The reversal of 7919061613 is 3161609197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7786650564 + 132411049 = 88242^2 + 11507^2 .

It is a cyclic number.

It is not a de Polignac number, because 7919061613 - 2¹³ = 7919053421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7919061613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7919061617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3959530806 + 3959530807.

It is an arithmetic number, because the mean of its divisors is an integer number (3959530807).

Almost surely, 2^7919061613 is an apocalyptic number.

It is an amenable number.

7919061613 is a deficient number, since it is larger than the sum of its proper divisors (1).

7919061613 is an equidigital number, since it uses as much as digits as its factorization.

7919061613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 7919061613 is about 88989.1095190867. The cubic root of 7919061613 is about 1993.2322590897.

The spelling of 7919061613 in words is "seven billion, nine hundred nineteen million, sixty-one thousand, six hundred thirteen".