2782783513 has 4 divisors (see below), whose sum is σ = 2782919988. Its totient is φ = 2782647040.

The previous prime is 2782783463. The next prime is 2782783517. The reversal of 2782783513 is 3153872872.

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 1641222144 + 1141561369 = 40512^2 + 33787^2 .

It is a cyclic number.

It is not a de Polignac number, because 2782783513 - 2⁹ = 2782783001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2782783517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30808 + ... + 80713.

It is an arithmetic number, because the mean of its divisors is an integer number (695729997).

Almost surely, 2^2782783513 is an apocalyptic number.

It is an amenable number.

2782783513 is a deficient number, since it is larger than the sum of its proper divisors (136475).

2782783513 is a wasteful number, since it uses less digits than its factorization.

2782783513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136474.

The product of its digits is 564480, while the sum is 46.

The square root of 2782783513 is about 52752.0948683557. The cubic root of 2782783513 is about 1406.5650022423.

The spelling of 2782783513 in words is "two billion, seven hundred eighty-two million, seven hundred eighty-three thousand, five hundred thirteen".