161616029 has 2 divisors, whose sum is σ = 161616030. Its totient is φ = 161616028.

The previous prime is 161616019. The next prime is 161616031. The reversal of 161616029 is 920616161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158810404 + 2805625 = 12602^2 + 1675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161616029 is a prime.

It is a super-2 number, since 2×161616029² = 52239481659457682, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 161616031, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161615986 and 161616004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161616019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80808014 + 80808015.

It is an arithmetic number, because the mean of its divisors is an integer number (80808015).

Almost surely, 2^161616029 is an apocalyptic number.

It is an amenable number.

161616029 is a deficient number, since it is larger than the sum of its proper divisors (1).

161616029 is an equidigital number, since it uses as much as digits as its factorization.

161616029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 161616029 is about 12712.8293074359. The cubic root of 161616029 is about 544.7051447739.

The spelling of 161616029 in words is "one hundred sixty-one million, six hundred sixteen thousand, twenty-nine".