8423839693 has 2 divisors, whose sum is σ = 8423839694. Its totient is φ = 8423839692.

The previous prime is 8423839681. The next prime is 8423839727. The reversal of 8423839693 is 3969383248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7701466564 + 722373129 = 87758^2 + 26877^2 .

It is a cyclic number.

It is not a de Polignac number, because 8423839693 - 2²⁵ = 8390285261 is a prime.

It is a super-2 number, since 2×8423839693² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8423839673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4211919846 + 4211919847.

It is an arithmetic number, because the mean of its divisors is an integer number (4211919847).

Almost surely, 2^8423839693 is an apocalyptic number.

It is an amenable number.

8423839693 is a deficient number, since it is larger than the sum of its proper divisors (1).

8423839693 is an equidigital number, since it uses as much as digits as its factorization.

8423839693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 55.

The square root of 8423839693 is about 91781.4779408133. The cubic root of 8423839693 is about 2034.7139589144.

The spelling of 8423839693 in words is "eight billion, four hundred twenty-three million, eight hundred thirty-nine thousand, six hundred ninety-three".