12782783 has 8 divisors (see below), whose sum is σ = 13855968. Its totient is φ = 11722464.

The previous prime is 12782767. The next prime is 12782789. The reversal of 12782783 is 38728721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12782783 - 2⁴ = 12782767 is a prime.

It is a super-3 number, since 3×12782783³ (a number of 22 digits) contains 333 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 (12782789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091 + ... + 5172.

It is an arithmetic number, because the mean of its divisors is an integer number (1731996).

Almost surely, 2^12782783 is an apocalyptic number.

12782783 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12782783 is a deficient number, since it is larger than the sum of its proper divisors (1073185).

12782783 is a wasteful number, since it uses less digits than its factorization.

12782783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6433.

The product of its digits is 37632, while the sum is 38.

The square root of 12782783 is about 3575.3018054424. The cubic root of 12782783 is about 233.8164911363.

The spelling of 12782783 in words is "twelve million, seven hundred eighty-two thousand, seven hundred eighty-three".