79129 has 4 divisors (see below), whose sum is σ = 80676. Its totient is φ = 77584.

The previous prime is 79111. The next prime is 79133. The reversal of 79129 is 92197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92197 = 7 ⋅13171.

It can be written as a sum of positive squares in 2 ways, for example, as 63504 + 15625 = 252^2 + 125^2 .

It is a cyclic number.

It is not a de Polignac number, because 79129 - 2¹¹ = 77081 is a prime.

It is a super-2 number, since 2×79129² = 12522797282, which contains 22 as substring.

It is a Duffinian number.

79129 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 79097 and 79106.

It is not an unprimeable number, because it can be changed into a prime (79139) 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, 694 + ... + 799.

It is an arithmetic number, because the mean of its divisors is an integer number (20169).

2⁷⁹¹²⁹ is an apocalyptic number.

It is an amenable number.

79129 is a deficient number, since it is larger than the sum of its proper divisors (1547).

79129 is a wasteful number, since it uses less digits than its factorization.

79129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546.

The product of its digits is 1134, while the sum is 28.

The square root of 79129 is about 281.2987735487. The cubic root of 79129 is about 42.9317467768.

It can be divided in two parts, 7912 and 9, that added together give a square (7921 = 89²).

The spelling of 79129 in words is "seventy-nine thousand, one hundred twenty-nine".