161080813 has 4 divisors (see below), whose sum is σ = 161363488. Its totient is φ = 160798140.

The previous prime is 161080811. The next prime is 161080817. The reversal of 161080813 is 318080161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161080813 - 2¹ = 161080811 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 (161080811) 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, 140481 + ... + 141622.

It is an arithmetic number, because the mean of its divisors is an integer number (40340872).

Almost surely, 2^161080813 is an apocalyptic number.

It is an amenable number.

161080813 is a deficient number, since it is larger than the sum of its proper divisors (282675).

161080813 is an equidigital number, since it uses as much as digits as its factorization.

161080813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282674.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 161080813 is about 12691.7616192552. The cubic root of 161080813 is about 544.1031885515.

The spelling of 161080813 in words is "one hundred sixty-one million, eighty thousand, eight hundred thirteen".