39925847697 has 16 divisors (see below), whose sum is σ = 54393365760. Its totient is φ = 26042058000.

The previous prime is 39925847659. The next prime is 39925847707. The reversal of 39925847697 is 79674852993.

It is not a de Polignac number, because 39925847697 - 2³² = 35630880401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39925847617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497179 + ... + 571872.

It is an arithmetic number, because the mean of its divisors is an integer number (3399585360).

Almost surely, 2^39925847697 is an apocalyptic number.

It is an amenable number.

39925847697 is a deficient number, since it is larger than the sum of its proper divisors (14467518063).

39925847697 is a wasteful number, since it uses less digits than its factorization.

39925847697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069324.

The product of its digits is 205752960, while the sum is 69.

The spelling of 39925847697 in words is "thirty-nine billion, nine hundred twenty-five million, eight hundred forty-seven thousand, six hundred ninety-seven".