161165713 has 2 divisors, whose sum is σ = 161165714. Its totient is φ = 161165712.

The previous prime is 161165671. The next prime is 161165743. The reversal of 161165713 is 317561161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83320384 + 77845329 = 9128^2 + 8823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161165713 is a prime.

It is not a weakly prime, because it can be changed into another prime (161165743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80582856 + 80582857.

It is an arithmetic number, because the mean of its divisors is an integer number (80582857).

Almost surely, 2^161165713 is an apocalyptic number.

It is an amenable number.

161165713 is a deficient number, since it is larger than the sum of its proper divisors (1).

161165713 is an equidigital number, since it uses as much as digits as its factorization.

161165713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 31.

The square root of 161165713 is about 12695.1058680107. The cubic root of 161165713 is about 544.1987642782.

The spelling of 161165713 in words is "one hundred sixty-one million, one hundred sixty-five thousand, seven hundred thirteen".