161579869 has 8 divisors (see below), whose sum is σ = 176382720. Its totient is φ = 146796000.

The previous prime is 161579863. The next prime is 161579959. The reversal of 161579869 is 968975161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161579869 - 2³ = 161579861 is a prime.

It is a super-2 number, since 2×161579869² = 52216108132114322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161579861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17697 + ... + 25225.

It is an arithmetic number, because the mean of its divisors is an integer number (22047840).

Almost surely, 2^161579869 is an apocalyptic number.

It is an amenable number.

161579869 is a deficient number, since it is larger than the sum of its proper divisors (14802851).

161579869 is a wasteful number, since it uses less digits than its factorization.

161579869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491.

The product of its digits is 816480, while the sum is 52.

The square root of 161579869 is about 12711.4070424953. The cubic root of 161579869 is about 544.6645176007.

The spelling of 161579869 in words is "one hundred sixty-one million, five hundred seventy-nine thousand, eight hundred sixty-nine".