3126838643 has 4 divisors (see below), whose sum is σ = 3142551600. Its totient is φ = 3111125688.

The previous prime is 3126838639. The next prime is 3126838681. The reversal of 3126838643 is 3468386213.

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 3126838643 - 2² = 3126838639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3126838594 and 3126838603.

It is not an unprimeable number, because it can be changed into a prime (3126858643) 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, 7856180 + ... + 7856577.

It is an arithmetic number, because the mean of its divisors is an integer number (785637900).

Almost surely, 2^3126838643 is an apocalyptic number.

3126838643 is a deficient number, since it is larger than the sum of its proper divisors (15712957).

3126838643 is a wasteful number, since it uses less digits than its factorization.

3126838643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15712956.

The product of its digits is 497664, while the sum is 44.

The square root of 3126838643 is about 55918.1423421773. The cubic root of 3126838643 is about 1462.2955448768.

The spelling of 3126838643 in words is "three billion, one hundred twenty-six million, eight hundred thirty-eight thousand, six hundred forty-three".