161206303 has 2 divisors, whose sum is σ = 161206304. Its totient is φ = 161206302.

The previous prime is 161206277. The next prime is 161206319. The reversal of 161206303 is 303602161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161206303 - 2⁹ = 161205791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161206363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80603151 + 80603152.

It is an arithmetic number, because the mean of its divisors is an integer number (80603152).

Almost surely, 2^161206303 is an apocalyptic number.

161206303 is a deficient number, since it is larger than the sum of its proper divisors (1).

161206303 is an equidigital number, since it uses as much as digits as its factorization.

161206303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 161206303 is about 12696.7044149259. The cubic root of 161206303 is about 544.2444463970.

Adding to 161206303 its reverse (303602161), we get a palindrome (464808464).

The spelling of 161206303 in words is "one hundred sixty-one million, two hundred six thousand, three hundred three".