161930099 has 2 divisors, whose sum is σ = 161930100. Its totient is φ = 161930098.

The previous prime is 161930077. The next prime is 161930123. The reversal of 161930099 is 990039161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161930099 - 2⁸ = 161929843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161930039) 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, 80965049 + 80965050.

It is an arithmetic number, because the mean of its divisors is an integer number (80965050).

Almost surely, 2^161930099 is an apocalyptic number.

161930099 is a deficient number, since it is larger than the sum of its proper divisors (1).

161930099 is an equidigital number, since it uses as much as digits as its factorization.

161930099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 161930099 is about 12725.1757944635. The cubic root of 161930099 is about 545.0577600596.

The spelling of 161930099 in words is "one hundred sixty-one million, nine hundred thirty thousand, ninety-nine".