8423434343247 has 32 divisors (see below), whose sum is σ = 14003444436480. Its totient is φ = 4375543710720.

The previous prime is 8423434343237. The next prime is 8423434343381. The reversal of 8423434343247 is 7423434343248.

It is not a de Polignac number, because 8423434343247 - 2⁴ = 8423434343231 is a prime.

It is a super-2 number, since 2×8423434343247² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8423434343247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8423434343227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2722279 + ... + 4925207.

It is an arithmetic number, because the mean of its divisors is an integer number (437607638640).

Almost surely, 2^{8423434343247} is an apocalyptic number.

8423434343247 is a deficient number, since it is larger than the sum of its proper divisors (5580010093233).

8423434343247 is a wasteful number, since it uses less digits than its factorization.

8423434343247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219503.

The product of its digits is 18579456, while the sum is 51.

Subtracting from 8423434343247 its reverse (7423434343248), we obtain a palindrome (999999999999).

The spelling of 8423434343247 in words is "eight trillion, four hundred twenty-three billion, four hundred thirty-four million, three hundred forty-three thousand, two hundred forty-seven".