161266103 has 2 divisors, whose sum is σ = 161266104. Its totient is φ = 161266102.

The previous prime is 161266019. The next prime is 161266111. The reversal of 161266103 is 301662161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161266103 - 2¹⁰ = 161265079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161266163) 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, 80633051 + 80633052.

It is an arithmetic number, because the mean of its divisors is an integer number (80633052).

Almost surely, 2^161266103 is an apocalyptic number.

161266103 is a deficient number, since it is larger than the sum of its proper divisors (1).

161266103 is an equidigital number, since it uses as much as digits as its factorization.

161266103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 161266103 is about 12699.0591383771. The cubic root of 161266103 is about 544.3117344905.

The spelling of 161266103 in words is "one hundred sixty-one million, two hundred sixty-six thousand, one hundred three".