39114978891 has 4 divisors (see below), whose sum is σ = 52153305192. Its totient is φ = 26076652592.

The previous prime is 39114978883. The next prime is 39114978971. The reversal of 39114978891 is 19887941193.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39114978891 - 2³ = 39114978883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39114978391) 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, 6519163146 + ... + 6519163151.

It is an arithmetic number, because the mean of its divisors is an integer number (13038326298).

Almost surely, 2^39114978891 is an apocalyptic number.

39114978891 is a deficient number, since it is larger than the sum of its proper divisors (13038326301).

39114978891 is a wasteful number, since it uses less digits than its factorization.

39114978891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13038326300.

The product of its digits is 3919104, while the sum is 60.

The spelling of 39114978891 in words is "thirty-nine billion, one hundred fourteen million, nine hundred seventy-eight thousand, eight hundred ninety-one".