39693439693 has 4 divisors (see below), whose sum is σ = 39696277500. Its totient is φ = 39690601888.

The previous prime is 39693439649. The next prime is 39693439699.

39693439693 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2065975209 + 37627464484 = 45453^2 + 193978^2 .

It is a cyclic number.

It is not a de Polignac number, because 39693439693 - 2²¹ = 39691342541 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 (39693439699) 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, 1397818 + ... + 1425931.

It is an arithmetic number, because the mean of its divisors is an integer number (9924069375).

Almost surely, 2^39693439693 is an apocalyptic number.

It is an amenable number.

39693439693 is a deficient number, since it is larger than the sum of its proper divisors (2837807).

39693439693 is a wasteful number, since it uses less digits than its factorization.

39693439693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837806.

The product of its digits is 76527504, while the sum is 64.

The spelling of 39693439693 in words is "thirty-nine billion, six hundred ninety-three million, four hundred thirty-nine thousand, six hundred ninety-three".