161290333 has 2 divisors, whose sum is σ = 161290334. Its totient is φ = 161290332.

The previous prime is 161290319. The next prime is 161290369. The reversal of 161290333 is 333092161.

161290333 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 can be written as a sum of positive squares in only one way, i.e., 161112249 + 178084 = 12693^2 + 422^2 .

It is an emirp because it is prime and its reverse (333092161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161290333 - 2⁵ = 161290301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161290313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80645166 + 80645167.

It is an arithmetic number, because the mean of its divisors is an integer number (80645167).

Almost surely, 2^161290333 is an apocalyptic number.

It is an amenable number.

161290333 is a deficient number, since it is larger than the sum of its proper divisors (1).

161290333 is an equidigital number, since it uses as much as digits as its factorization.

161290333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 161290333 is about 12700.0131102295. The cubic root of 161290333 is about 544.3389938104.

The spelling of 161290333 in words is "one hundred sixty-one million, two hundred ninety thousand, three hundred thirty-three".