39679497693 has 18 divisors (see below), whose sum is σ = 62998947102. Its totient is φ = 24048179760.

The previous prime is 39679497679. The next prime is 39679497749.

39679497693 is a `hidden beast` number, since 3 + 9 + 6 + 79 + 497 + 69 + 3 = 666.

39679497693 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 39060383769 + 619113924 = 197637^2 + 24882^2 .

It is not a de Polignac number, because 39679497693 - 2¹⁶ = 39679432157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39679492693) 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 17 ways as a sum of consecutive naturals, for example, 18217230 + ... + 18219407.

Almost surely, 2^39679497693 is an apocalyptic number.

39679497693 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

39679497693 is a deficient number, since it is larger than the sum of its proper divisors (23319449409).

39679497693 is a wasteful number, since it uses less digits than its factorization.

39679497693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36436665 (or 36436651 counting only the distinct ones).

The product of its digits is 416649744, while the sum is 72.

The spelling of 39679497693 in words is "thirty-nine billion, six hundred seventy-nine million, four hundred ninety-seven thousand, six hundred ninety-three".