83138662693 has 4 divisors (see below), whose sum is σ = 83149048768. Its totient is φ = 83128276620.

The previous prime is 83138662679. The next prime is 83138662709. The reversal of 83138662693 is 39626683138.

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 83138662693 - 2¹⁷ = 83138531621 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 (83138662493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5181021 + ... + 5197042.

It is an arithmetic number, because the mean of its divisors is an integer number (20787262192).

Almost surely, 2^83138662693 is an apocalyptic number.

It is an amenable number.

83138662693 is a deficient number, since it is larger than the sum of its proper divisors (10386075).

83138662693 is a wasteful number, since it uses less digits than its factorization.

83138662693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10386074.

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

It can be divided in two parts, 831 and 38662693, that added together give a square (38663524 = 6218²).

The spelling of 83138662693 in words is "eighty-three billion, one hundred thirty-eight million, six hundred sixty-two thousand, six hundred ninety-three".