83423666632439 has 4 divisors (see below), whose sum is σ = 95341333294224. Its totient is φ = 71505999970656.

The previous prime is 83423666632387. The next prime is 83423666632463. The reversal of 83423666632439 is 93423666632438.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83423666632439 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 (83423666632499) 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, 5958833330882 + ... + 5958833330895.

It is an arithmetic number, because the mean of its divisors is an integer number (23835333323556).

Almost surely, 2^{83423666632439} is an apocalyptic number.

83423666632439 is a deficient number, since it is larger than the sum of its proper divisors (11917666661785).

83423666632439 is a wasteful number, since it uses less digits than its factorization.

83423666632439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11917666661784.

The product of its digits is 483729408, while the sum is 65.

Subtracting 83423666632439 from its reverse (93423666632438), we obtain a palindrome (9999999999999).

The spelling of 83423666632439 in words is "eighty-three trillion, four hundred twenty-three billion, six hundred sixty-six million, six hundred thirty-two thousand, four hundred thirty-nine".