8535273421 has 4 divisors (see below), whose sum is σ = 8535683772. Its totient is φ = 8534863072.

The previous prime is 8535273407. The next prime is 8535273427. The reversal of 8535273421 is 1243725358.

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 4206949321 + 4328324100 = 64861^2 + 65790^2 .

It is a cyclic number.

It is not a de Polignac number, because 8535273421 - 2¹¹ = 8535271373 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 (8535273427) 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, 172210 + ... + 216163.

It is an arithmetic number, because the mean of its divisors is an integer number (2133920943).

Almost surely, 2^8535273421 is an apocalyptic number.

It is an amenable number.

8535273421 is a deficient number, since it is larger than the sum of its proper divisors (410351).

8535273421 is a wasteful number, since it uses less digits than its factorization.

8535273421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410350.

The product of its digits is 201600, while the sum is 40.

The square root of 8535273421 is about 92386.5435060756. The cubic root of 8535273421 is about 2043.6466733436.

Adding to 8535273421 its reverse (1243725358), we get a palindrome (9778998779).

The spelling of 8535273421 in words is "eight billion, five hundred thirty-five million, two hundred seventy-three thousand, four hundred twenty-one".