161332013 has 2 divisors, whose sum is σ = 161332014. Its totient is φ = 161332012.

The previous prime is 161331979. The next prime is 161332027. The reversal of 161332013 is 310233161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130005604 + 31326409 = 11402^2 + 5597^2 .

It is a cyclic number.

It is not a de Polignac number, because 161332013 - 2⁶ = 161331949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161332313) 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, 80666006 + 80666007.

It is an arithmetic number, because the mean of its divisors is an integer number (80666007).

Almost surely, 2^161332013 is an apocalyptic number.

It is an amenable number.

161332013 is a deficient number, since it is larger than the sum of its proper divisors (1).

161332013 is an equidigital number, since it uses as much as digits as its factorization.

161332013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 161332013 is about 12701.6539474196. The cubic root of 161332013 is about 544.3858784042.

Adding to 161332013 its reverse (310233161), we get a palindrome (471565174).

The spelling of 161332013 in words is "one hundred sixty-one million, three hundred thirty-two thousand, thirteen".