12498779 has 4 divisors (see below), whose sum is σ = 12539280. Its totient is φ = 12458280.

The previous prime is 12498763. The next prime is 12498793. The reversal of 12498779 is 97789421.

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 12498779 - 2⁴ = 12498763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12498719) 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, 19784 + ... + 20405.

It is an arithmetic number, because the mean of its divisors is an integer number (3134820).

Almost surely, 2^12498779 is an apocalyptic number.

12498779 is a deficient number, since it is larger than the sum of its proper divisors (40501).

12498779 is an equidigital number, since it uses as much as digits as its factorization.

12498779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40500.

The product of its digits is 254016, while the sum is 47.

The square root of 12498779 is about 3535.3612262398. The cubic root of 12498779 is about 232.0718849280.

The spelling of 12498779 in words is "twelve million, four hundred ninety-eight thousand, seven hundred seventy-nine".