161083869 has 4 divisors (see below), whose sum is σ = 214778496. Its totient is φ = 107389244.

The previous prime is 161083841. The next prime is 161083913. The reversal of 161083869 is 968380161.

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 161083869 - 2⁵ = 161083837 is a prime.

It is a super-2 number, since 2×161083869² = 51896025704018322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161083869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161083469) 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, 26847309 + ... + 26847314.

It is an arithmetic number, because the mean of its divisors is an integer number (53694624).

Almost surely, 2^161083869 is an apocalyptic number.

It is an amenable number.

161083869 is a deficient number, since it is larger than the sum of its proper divisors (53694627).

161083869 is an equidigital number, since it uses as much as digits as its factorization.

161083869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53694626.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 161083869 is about 12691.8820117428. The cubic root of 161083869 is about 544.1066294100.

The spelling of 161083869 in words is "one hundred sixty-one million, eighty-three thousand, eight hundred sixty-nine".