161729699 has 2 divisors, whose sum is σ = 161729700. Its totient is φ = 161729698.

The previous prime is 161729681. The next prime is 161729719. The reversal of 161729699 is 996927161.

161729699 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161729699 - 2²⁰ = 160681123 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (161729609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80864849 + 80864850.

It is an arithmetic number, because the mean of its divisors is an integer number (80864850).

Almost surely, 2^161729699 is an apocalyptic number.

161729699 is a deficient number, since it is larger than the sum of its proper divisors (1).

161729699 is an equidigital number, since it uses as much as digits as its factorization.

161729699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 50.

The square root of 161729699 is about 12717.2992022678. The cubic root of 161729699 is about 544.8328180083.

The spelling of 161729699 in words is "one hundred sixty-one million, seven hundred twenty-nine thousand, six hundred ninety-nine".