161794361 has 2 divisors, whose sum is σ = 161794362. Its totient is φ = 161794360.

The previous prime is 161794333. The next prime is 161794411. The reversal of 161794361 is 163497161.

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., 157653136 + 4141225 = 12556^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 161794361 - 2¹⁴ = 161777977 is a prime.

It is not a weakly prime, because it can be changed into another prime (161794331) 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, 80897180 + 80897181.

It is an arithmetic number, because the mean of its divisors is an integer number (80897181).

Almost surely, 2^161794361 is an apocalyptic number.

It is an amenable number.

161794361 is a deficient number, since it is larger than the sum of its proper divisors (1).

161794361 is an equidigital number, since it uses as much as digits as its factorization.

161794361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 161794361 is about 12719.8412332859. The cubic root of 161794361 is about 544.9054191565.

The spelling of 161794361 in words is "one hundred sixty-one million, seven hundred ninety-four thousand, three hundred sixty-one".