161446091 has 2 divisors, whose sum is σ = 161446092. Its totient is φ = 161446090.

The previous prime is 161446073. The next prime is 161446099. The reversal of 161446091 is 190644161.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161446091 - 2¹⁴ = 161429707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (161446099) 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, 80723045 + 80723046.

It is an arithmetic number, because the mean of its divisors is an integer number (80723046).

Almost surely, 2^161446091 is an apocalyptic number.

161446091 is a deficient number, since it is larger than the sum of its proper divisors (1).

161446091 is an equidigital number, since it uses as much as digits as its factorization.

161446091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 161446091 is about 12706.1438288727. The cubic root of 161446091 is about 544.5141600747.

The spelling of 161446091 in words is "one hundred sixty-one million, four hundred forty-six thousand, ninety-one".