39976707697 has 4 divisors (see below), whose sum is σ = 42328278756. Its totient is φ = 37625136640.

The previous prime is 39976707689. The next prime is 39976707713. The reversal of 39976707697 is 79670767993.

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 26178916401 + 13797791296 = 161799^2 + 117464^2 .

It is a cyclic number.

It is not a de Polignac number, because 39976707697 - 2³ = 39976707689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39976707497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1175785504 + ... + 1175785537.

It is an arithmetic number, because the mean of its divisors is an integer number (10582069689).

Almost surely, 2^39976707697 is an apocalyptic number.

It is an amenable number.

39976707697 is a deficient number, since it is larger than the sum of its proper divisors (2351571059).

39976707697 is a wasteful number, since it uses less digits than its factorization.

39976707697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351571058.

The product of its (nonzero) digits is 189035532, while the sum is 70.

The spelling of 39976707697 in words is "thirty-nine billion, nine hundred seventy-six million, seven hundred seven thousand, six hundred ninety-seven".