79540829 has 4 divisors (see below), whose sum is σ = 79822176. Its totient is φ = 79259484.

The previous prime is 79540789. The next prime is 79540837. The reversal of 79540829 is 92804597.

It is a happy number.

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: 92804597 = 71 ⋅1307107.

It is a cyclic number.

It is not a de Polignac number, because 79540829 - 2¹² = 79536733 is a prime.

It is a super-3 number, since 3×79540829³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79540829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79540529) 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, 140249 + ... + 140814.

It is an arithmetic number, because the mean of its divisors is an integer number (19955544).

Almost surely, 2^79540829 is an apocalyptic number.

It is an amenable number.

79540829 is a deficient number, since it is larger than the sum of its proper divisors (281347).

79540829 is a wasteful number, since it uses less digits than its factorization.

79540829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281346.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 79540829 is about 8918.5665328011. The cubic root of 79540829 is about 430.0609774711.

The spelling of 79540829 in words is "seventy-nine million, five hundred forty thousand, eight hundred twenty-nine".