2126782793 has 4 divisors (see below), whose sum is σ = 2127338628. Its totient is φ = 2126226960.

The previous prime is 2126782789. The next prime is 2126782813. The reversal of 2126782793 is 3972876212.

It is a happy number.

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 2039696569 + 87086224 = 45163^2 + 9332^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126782793 - 2² = 2126782789 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2126782783) 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, 272138 + ... + 279843.

It is an arithmetic number, because the mean of its divisors is an integer number (531834657).

Almost surely, 2^2126782793 is an apocalyptic number.

It is an amenable number.

2126782793 is a deficient number, since it is larger than the sum of its proper divisors (555835).

2126782793 is an equidigital number, since it uses as much as digits as its factorization.

2126782793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555834.

The product of its digits is 508032, while the sum is 47.

The square root of 2126782793 is about 46117.0553374779. The cubic root of 2126782793 is about 1286.0002291697. Note that the first 3 decimals are identical.

The spelling of 2126782793 in words is "two billion, one hundred twenty-six million, seven hundred eighty-two thousand, seven hundred ninety-three".