12619261979 has 2 divisors, whose sum is σ = 12619261980. Its totient is φ = 12619261978.

The previous prime is 12619261951. The next prime is 12619261997. The reversal of 12619261979 is 97916291621.

Together with next prime (12619261997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12619261979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12619261979.

It is not a weakly prime, because it can be changed into another prime (12619261679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6309630989 + 6309630990.

It is an arithmetic number, because the mean of its divisors is an integer number (6309630990).

Almost surely, 2^12619261979 is an apocalyptic number.

12619261979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12619261979 is an equidigital number, since it uses as much as digits as its factorization.

12619261979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 53.

The spelling of 12619261979 in words is "twelve billion, six hundred nineteen million, two hundred sixty-one thousand, nine hundred seventy-nine".