39487503961 has 4 divisors (see below), whose sum is σ = 39572060112. Its totient is φ = 39402947812.

The previous prime is 39487503959. The next prime is 39487503971. The reversal of 39487503961 is 16930578493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16930578493 = 64453 ⋅262681.

It is a cyclic number.

It is not a de Polignac number, because 39487503961 - 2¹ = 39487503959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39487503911) 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 3 ways as a sum of consecutive naturals, for example, 42277375 + ... + 42278308.

It is an arithmetic number, because the mean of its divisors is an integer number (9893015028).

Almost surely, 2^39487503961 is an apocalyptic number.

It is an amenable number.

39487503961 is a deficient number, since it is larger than the sum of its proper divisors (84556151).

39487503961 is an equidigital number, since it uses as much as digits as its factorization.

39487503961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84556150.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 39487503961 in words is "thirty-nine billion, four hundred eighty-seven million, five hundred three thousand, nine hundred sixty-one".