79888169 has 4 divisors (see below), whose sum is σ = 80029140. Its totient is φ = 79747200.

The previous prime is 79888163. The next prime is 79888181. The reversal of 79888169 is 96188897.

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: 96188897 = 7 ⋅13741271.

It can be written as a sum of positive squares in 2 ways, for example, as 5583769 + 74304400 = 2363^2 + 8620^2 .

It is a cyclic number.

It is not a de Polignac number, because 79888169 - 2⁴ = 79888153 is a prime.

It is a super-2 number, since 2×79888169² = 12764239092345122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79888163) 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, 69632 + ... + 70769.

It is an arithmetic number, because the mean of its divisors is an integer number (20007285).

Almost surely, 2^79888169 is an apocalyptic number.

It is an amenable number.

79888169 is a deficient number, since it is larger than the sum of its proper divisors (140971).

79888169 is a wasteful number, since it uses less digits than its factorization.

79888169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140970.

The product of its digits is 1741824, while the sum is 56.

The square root of 79888169 is about 8938.0181807826. The cubic root of 79888169 is about 430.6860672242.

The spelling of 79888169 in words is "seventy-nine million, eight hundred eighty-eight thousand, one hundred sixty-nine".