12500779 has 2 divisors, whose sum is σ = 12500780. Its totient is φ = 12500778.

The previous prime is 12500773. The next prime is 12500809. The reversal of 12500779 is 97700521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12500779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12500779.

It is not a weakly prime, because it can be changed into another prime (12500773) 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 as a sum of consecutive naturals, namely, 6250389 + 6250390.

It is an arithmetic number, because the mean of its divisors is an integer number (6250390).

Almost surely, 2^12500779 is an apocalyptic number.

12500779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12500779 is an equidigital number, since it uses as much as digits as its factorization.

12500779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 12500779 is about 3535.6440714529. The cubic root of 12500779 is about 232.0842626441.

The spelling of 12500779 in words is "twelve million, five hundred thousand, seven hundred seventy-nine".