161330413 has 4 divisors (see below), whose sum is σ = 161394588. Its totient is φ = 161266240.

The previous prime is 161330401. The next prime is 161330423. The reversal of 161330413 is 314033161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 314033161 = 13 ⋅24156397.

It can be written as a sum of positive squares in 2 ways, for example, as 151856329 + 9474084 = 12323^2 + 3078^2 .

It is a cyclic number.

It is not a de Polignac number, because 161330413 - 2⁵ = 161330381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161330423) 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 in 3 ways as a sum of consecutive naturals, for example, 28156 + ... + 33397.

It is an arithmetic number, because the mean of its divisors is an integer number (40348647).

Almost surely, 2^161330413 is an apocalyptic number.

It is an amenable number.

161330413 is a deficient number, since it is larger than the sum of its proper divisors (64175).

161330413 is an equidigital number, since it uses as much as digits as its factorization.

161330413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64174.

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

The square root of 161330413 is about 12701.5909633400. The cubic root of 161330413 is about 544.3840787607.

Adding to 161330413 its reverse (314033161), we get a palindrome (475363574).

The spelling of 161330413 in words is "one hundred sixty-one million, three hundred thirty thousand, four hundred thirteen".