8242772429 has 4 divisors (see below), whose sum is σ = 8243344284. Its totient is φ = 8242200576.

The previous prime is 8242772423. The next prime is 8242772431. The reversal of 8242772429 is 9242772428.

It is a happy number.

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 1005016804 + 7237755625 = 31702^2 + 85075^2 .

It is a cyclic number.

It is not a de Polignac number, because 8242772429 - 2¹² = 8242768333 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 (8242772423) 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, 263732 + ... + 293325.

It is an arithmetic number, because the mean of its divisors is an integer number (2060836071).

Almost surely, 2^8242772429 is an apocalyptic number.

It is an amenable number.

8242772429 is a deficient number, since it is larger than the sum of its proper divisors (571855).

8242772429 is a wasteful number, since it uses less digits than its factorization.

8242772429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571854.

The product of its digits is 903168, while the sum is 47.

The square root of 8242772429 is about 90789.7154362762. The cubic root of 8242772429 is about 2020.0297702537.

Subtracting 8242772429 from its reverse (9242772428), we obtain a palindrome (999999999).

The spelling of 8242772429 in words is "eight billion, two hundred forty-two million, seven hundred seventy-two thousand, four hundred twenty-nine".