79129069 has 4 divisors (see below), whose sum is σ = 79290720. Its totient is φ = 78967420.

The previous prime is 79129049. The next prime is 79129111. The reversal of 79129069 is 96092197.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96092197 = 617 ⋅155741.

It is a cyclic number.

It is not a de Polignac number, because 79129069 - 2¹¹ = 79127021 is a prime.

It is a super-2 number, since 2×79129069² = 12522819121613522, 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 (79129049) 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, 80089 + ... + 81070.

It is an arithmetic number, because the mean of its divisors is an integer number (19822680).

Almost surely, 2^79129069 is an apocalyptic number.

It is an amenable number.

79129069 is a deficient number, since it is larger than the sum of its proper divisors (161651).

79129069 is a wasteful number, since it uses less digits than its factorization.

79129069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161650.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 79129069 is about 8895.4521526452. The cubic root of 79129069 is about 429.3175925558.

The spelling of 79129069 in words is "seventy-nine million, one hundred twenty-nine thousand, sixty-nine".