79729829 has 8 divisors (see below), whose sum is σ = 80797080. Its totient is φ = 78667776.

The previous prime is 79729823. The next prime is 79729831. The reversal of 79729829 is 92892797.

It can be written as a sum of positive squares in 4 ways, for example, as 1760929 + 77968900 = 1327^2 + 8830^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 79729829 - 2²⁴ = 62952613 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 (79729823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36677 + ... + 38789.

It is an arithmetic number, because the mean of its divisors is an integer number (10099635).

Almost surely, 2^79729829 is an apocalyptic number.

It is an amenable number.

79729829 is a deficient number, since it is larger than the sum of its proper divisors (1067251).

79729829 is a wasteful number, since it uses less digits than its factorization.

79729829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599.

The product of its digits is 1143072, while the sum is 53.

The square root of 79729829 is about 8929.1561191414. The cubic root of 79729829 is about 430.4013361351.

The spelling of 79729829 in words is "seventy-nine million, seven hundred twenty-nine thousand, eight hundred twenty-nine".