2891376139 has 4 divisors (see below), whose sum is σ = 2919447856. Its totient is φ = 2863304424.

The previous prime is 2891376109. The next prime is 2891376143. The reversal of 2891376139 is 9316731982.

2891376139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9316731982 = 2 ⋅4658365991.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2891376139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2891376092 and 2891376101.

It is not an unprimeable number, because it can be changed into a prime (2891376109) 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, 14035704 + ... + 14035909.

It is an arithmetic number, because the mean of its divisors is an integer number (729861964).

Almost surely, 2^2891376139 is an apocalyptic number.

2891376139 is a deficient number, since it is larger than the sum of its proper divisors (28071717).

2891376139 is a wasteful number, since it uses less digits than its factorization.

2891376139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28071716.

The product of its digits is 489888, while the sum is 49.

The square root of 2891376139 is about 53771.5179160864. The cubic root of 2891376139 is about 1424.6281806561.

The spelling of 2891376139 in words is "two billion, eight hundred ninety-one million, three hundred seventy-six thousand, one hundred thirty-nine".