12783579 has 4 divisors (see below), whose sum is σ = 17044776. Its totient is φ = 8522384.

The previous prime is 12783571. The next prime is 12783593. The reversal of 12783579 is 97538721.

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 12783579 - 2³ = 12783571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12783579.

It is not an unprimeable number, because it can be changed into a prime (12783571) 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, 2130594 + ... + 2130599.

It is an arithmetic number, because the mean of its divisors is an integer number (4261194).

Almost surely, 2^12783579 is an apocalyptic number.

12783579 is a deficient number, since it is larger than the sum of its proper divisors (4261197).

12783579 is an equidigital number, since it uses as much as digits as its factorization.

12783579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261196.

The product of its digits is 105840, while the sum is 42.

The square root of 12783579 is about 3575.4131229831. The cubic root of 12783579 is about 233.8213443847.

The spelling of 12783579 in words is "twelve million, seven hundred eighty-three thousand, five hundred seventy-nine".