161268719 has 2 divisors, whose sum is σ = 161268720. Its totient is φ = 161268718.

The previous prime is 161268683. The next prime is 161268743. The reversal of 161268719 is 917862161.

It is a strong prime.

It is an emirp because it is prime and its reverse (917862161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161268719 - 2⁸ = 161268463 is a prime.

It is a super-2 number, since 2×161268719² = 52015199455801922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161268319) 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, 80634359 + 80634360.

It is an arithmetic number, because the mean of its divisors is an integer number (80634360).

Almost surely, 2^161268719 is an apocalyptic number.

161268719 is a deficient number, since it is larger than the sum of its proper divisors (1).

161268719 is an equidigital number, since it uses as much as digits as its factorization.

161268719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 41.

The square root of 161268719 is about 12699.1621377160. The cubic root of 161268719 is about 544.3146776835.

The spelling of 161268719 in words is "one hundred sixty-one million, two hundred sixty-eight thousand, seven hundred nineteen".