82724429 has 4 divisors (see below), whose sum is σ = 84742140. Its totient is φ = 80706720.

The previous prime is 82724419. The next prime is 82724459. The reversal of 82724429 is 92442728.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13801225 + 68923204 = 3715^2 + 8302^2 .

It is a cyclic number.

It is not a de Polignac number, because 82724429 - 2¹⁶ = 82658893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 82724392 and 82724401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82724419) 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, 1008794 + ... + 1008875.

It is an arithmetic number, because the mean of its divisors is an integer number (21185535).

Almost surely, 2^82724429 is an apocalyptic number.

It is an amenable number.

82724429 is a deficient number, since it is larger than the sum of its proper divisors (2017711).

82724429 is a wasteful number, since it uses less digits than its factorization.

82724429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017710.

The product of its digits is 64512, while the sum is 38.

The square root of 82724429 is about 9095.2970814592. The cubic root of 82724429 is about 435.7237767964.

The spelling of 82724429 in words is "eighty-two million, seven hundred twenty-four thousand, four hundred twenty-nine".