8436273121 has 4 divisors (see below), whose sum is σ = 8436639744. Its totient is φ = 8435906500.

The previous prime is 8436273091. The next prime is 8436273127. The reversal of 8436273121 is 1213726348.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8436273121 - 2⁷ = 8436272993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8436273127) 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, 146305 + ... + 195646.

It is an arithmetic number, because the mean of its divisors is an integer number (2109159936).

Almost surely, 2^8436273121 is an apocalyptic number.

It is an amenable number.

8436273121 is a deficient number, since it is larger than the sum of its proper divisors (366623).

8436273121 is a wasteful number, since it uses less digits than its factorization.

8436273121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366622.

The product of its digits is 48384, while the sum is 37.

The square root of 8436273121 is about 91849.1868281914. The cubic root of 8436273121 is about 2035.7145332343.

Adding to 8436273121 its reverse (1213726348), we get a palindrome (9649999469).

The spelling of 8436273121 in words is "eight billion, four hundred thirty-six million, two hundred seventy-three thousand, one hundred twenty-one".