1613686517 has 2 divisors, whose sum is σ = 1613686518. Its totient is φ = 1613686516.

The previous prime is 1613686483. The next prime is 1613686523. The reversal of 1613686517 is 7156863161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 975063076 + 638623441 = 31226^2 + 25271^2 .

It is a cyclic number.

It is not a de Polignac number, because 1613686517 - 2⁶ = 1613686453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1613686537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806843258 + 806843259.

It is an arithmetic number, because the mean of its divisors is an integer number (806843259).

Almost surely, 2^1613686517 is an apocalyptic number.

It is an amenable number.

1613686517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613686517 is an equidigital number, since it uses as much as digits as its factorization.

1613686517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 1613686517 is about 40170.7171581489. The cubic root of 1613686517 is about 1172.9325992388.

The spelling of 1613686517 in words is "one billion, six hundred thirteen million, six hundred eighty-six thousand, five hundred seventeen".