7919061617 has 2 divisors, whose sum is σ = 7919061618. Its totient is φ = 7919061616.

The previous prime is 7919061613. The next prime is 7919061643. The reversal of 7919061617 is 7161609197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5391083776 + 2527977841 = 73424^2 + 50279^2 .

It is a cyclic number.

It is not a de Polignac number, because 7919061617 - 2² = 7919061613 is a prime.

It is not a weakly prime, because it can be changed into another prime (7919061613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3959530808 + 3959530809.

It is an arithmetic number, because the mean of its divisors is an integer number (3959530809).

Almost surely, 2^7919061617 is an apocalyptic number.

It is an amenable number.

7919061617 is a deficient number, since it is larger than the sum of its proper divisors (1).

7919061617 is an equidigital number, since it uses as much as digits as its factorization.

7919061617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 47.

The square root of 7919061617 is about 88989.1095415613. The cubic root of 7919061617 is about 1993.2322594253.

The spelling of 7919061617 in words is "seven billion, nine hundred nineteen million, sixty-one thousand, six hundred seventeen".