39971500971 has 32 divisors (see below), whose sum is σ = 59588213760. Its totient is φ = 23685014016.

The previous prime is 39971500909. The next prime is 39971501041. The reversal of 39971500971 is 17900517993.

It is not a de Polignac number, because 39971500971 - 2¹¹ = 39971498923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (39971500271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242110 + ... + 372236.

It is an arithmetic number, because the mean of its divisors is an integer number (1862131680).

Almost surely, 2^39971500971 is an apocalyptic number.

39971500971 is a deficient number, since it is larger than the sum of its proper divisors (19616712789).

39971500971 is a wasteful number, since it uses less digits than its factorization.

39971500971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130483.

The product of its (nonzero) digits is 535815, while the sum is 51.

The spelling of 39971500971 in words is "thirty-nine billion, nine hundred seventy-one million, five hundred thousand, nine hundred seventy-one".