2938127861 has 4 divisors (see below), whose sum is σ = 2938305324. Its totient is φ = 2937950400.

The previous prime is 2938127849. The next prime is 2938127869. The reversal of 2938127861 is 1687218392.

It is a happy number.

2938127861 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.

It can be written as a sum of positive squares in 2 ways, for example, as 1953109636 + 985018225 = 44194^2 + 31385^2 .

It is a cyclic number.

It is not a de Polignac number, because 2938127861 - 2¹⁰ = 2938126837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2938127869) 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, 61010 + ... + 97971.

It is an arithmetic number, because the mean of its divisors is an integer number (734576331).

Almost surely, 2^2938127861 is an apocalyptic number.

It is an amenable number.

2938127861 is a deficient number, since it is larger than the sum of its proper divisors (177463).

2938127861 is a wasteful number, since it uses less digits than its factorization.

2938127861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177462.

The product of its digits is 290304, while the sum is 47.

The square root of 2938127861 is about 54204.5003758913. The cubic root of 2938127861 is about 1432.2656085672.

The spelling of 2938127861 in words is "two billion, nine hundred thirty-eight million, one hundred twenty-seven thousand, eight hundred sixty-one".