39087969861 has 4 divisors (see below), whose sum is σ = 52117293152. Its totient is φ = 26058646572.

The previous prime is 39087969853. The next prime is 39087969863. The reversal of 39087969861 is 16896978093.

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.

It is not a de Polignac number, because 39087969861 - 2³ = 39087969853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39087969792 and 39087969801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39087969863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6514661641 + ... + 6514661646.

It is an arithmetic number, because the mean of its divisors is an integer number (13029323288).

Almost surely, 2^39087969861 is an apocalyptic number.

It is an amenable number.

39087969861 is a deficient number, since it is larger than the sum of its proper divisors (13029323291).

39087969861 is a wasteful number, since it uses less digits than its factorization.

39087969861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13029323290.

The product of its (nonzero) digits is 35271936, while the sum is 66.

The spelling of 39087969861 in words is "thirty-nine billion, eighty-seven million, nine hundred sixty-nine thousand, eight hundred sixty-one".