161188679 has 4 divisors (see below), whose sum is σ = 170670384. Its totient is φ = 151706976.

The previous prime is 161188663. The next prime is 161188681. The reversal of 161188679 is 976881161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976881161 = 157 ⋅6222173.

It is a cyclic number.

It is not a de Polignac number, because 161188679 - 2⁴ = 161188663 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 (161188619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4740827 + ... + 4740860.

It is an arithmetic number, because the mean of its divisors is an integer number (42667596).

Almost surely, 2^161188679 is an apocalyptic number.

161188679 is a deficient number, since it is larger than the sum of its proper divisors (9481705).

161188679 is an equidigital number, since it uses as much as digits as its factorization.

161188679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9481704.

The product of its digits is 145152, while the sum is 47.

The square root of 161188679 is about 12696.0103575887. The cubic root of 161188679 is about 544.2246123634.

The spelling of 161188679 in words is "one hundred sixty-one million, one hundred eighty-eight thousand, six hundred seventy-nine".