8542029217 has 4 divisors (see below), whose sum is σ = 8550773316. Its totient is φ = 8533285120.

The previous prime is 8542029211. The next prime is 8542029281. The reversal of 8542029217 is 7129202458.

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 3483832576 + 5058196641 = 59024^2 + 71121^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8542029217 is a prime.

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 8542029217.

It is not an unprimeable number, because it can be changed into a prime (8542029211) 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, 4370584 + ... + 4372537.

It is an arithmetic number, because the mean of its divisors is an integer number (2137693329).

Almost surely, 2^8542029217 is an apocalyptic number.

It is an amenable number.

8542029217 is a deficient number, since it is larger than the sum of its proper divisors (8744099).

8542029217 is an equidigital number, since it uses as much as digits as its factorization.

8542029217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8744098.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 8542029217 is about 92423.0989363590. The cubic root of 8542029217 is about 2044.1857234036.

The spelling of 8542029217 in words is "eight billion, five hundred forty-two million, twenty-nine thousand, two hundred seventeen".