2868127781 has 4 divisors (see below), whose sum is σ = 2960648064. Its totient is φ = 2775607500.

The previous prime is 2868127763. The next prime is 2868127793. The reversal of 2868127781 is 1877218682.

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: 1877218682 = 2 ⋅938609341.

It is a cyclic number.

It is not a de Polignac number, because 2868127781 - 2²⁶ = 2801018917 is a prime.

It is a super-2 number, since 2×2868127781² = 16452313936287967922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2868127711) 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, 46260095 + ... + 46260156.

It is an arithmetic number, because the mean of its divisors is an integer number (740162016).

Almost surely, 2^2868127781 is an apocalyptic number.

It is an amenable number.

2868127781 is a deficient number, since it is larger than the sum of its proper divisors (92520283).

2868127781 is an equidigital number, since it uses as much as digits as its factorization.

2868127781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92520282.

The product of its digits is 602112, while the sum is 50.

The square root of 2868127781 is about 53554.9043599183. The cubic root of 2868127781 is about 1420.7996192362.

Subtracting from 2868127781 its reverse (1877218682), we obtain a palindrome (990909099).

The spelling of 2868127781 in words is "two billion, eight hundred sixty-eight million, one hundred twenty-seven thousand, seven hundred eighty-one".