161268329 has 2 divisors, whose sum is σ = 161268330. Its totient is φ = 161268328.

The previous prime is 161268319. The next prime is 161268353. The reversal of 161268329 is 923862161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105616729 + 55651600 = 10277^2 + 7460^2 .

It is a cyclic number.

It is not a de Polignac number, because 161268329 - 2²⁰ = 160219753 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 161268292 and 161268301.

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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80634164 + 80634165.

It is an arithmetic number, because the mean of its divisors is an integer number (80634165).

Almost surely, 2^161268329 is an apocalyptic number.

It is an amenable number.

161268329 is a deficient number, since it is larger than the sum of its proper divisors (1).

161268329 is an equidigital number, since it uses as much as digits as its factorization.

161268329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 161268329 is about 12699.1467823630. The cubic root of 161268329 is about 544.3142389068.

The spelling of 161268329 in words is "one hundred sixty-one million, two hundred sixty-eight thousand, three hundred twenty-nine".