12778583 has 4 divisors (see below), whose sum is σ = 13451160. Its totient is φ = 12106008.

The previous prime is 12778561. The next prime is 12778627. The reversal of 12778583 is 38587721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38587721 = 23 ⋅1677727.

It is a cyclic number.

It is not a de Polignac number, because 12778583 - 2⁸ = 12778327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12778583.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12778523) 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, 336260 + ... + 336297.

It is an arithmetic number, because the mean of its divisors is an integer number (3362790).

Almost surely, 2^12778583 is an apocalyptic number.

12778583 is a deficient number, since it is larger than the sum of its proper divisors (672577).

12778583 is an equidigital number, since it uses as much as digits as its factorization.

12778583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672576.

The product of its digits is 94080, while the sum is 41.

The square root of 12778583 is about 3574.7143941859. The cubic root of 12778583 is about 233.7908802075.

The spelling of 12778583 in words is "twelve million, seven hundred seventy-eight thousand, five hundred eighty-three".