1259499979 has 2 divisors, whose sum is σ = 1259499980. Its totient is φ = 1259499978.

The previous prime is 1259499959. The next prime is 1259500007. The reversal of 1259499979 is 9799949521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1259499979 - 2²¹ = 1257402827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1259499979.

It is not a weakly prime, because it can be changed into another prime (1259499919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 629749989 + 629749990.

It is an arithmetic number, because the mean of its divisors is an integer number (629749990).

Almost surely, 2^1259499979 is an apocalyptic number.

1259499979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1259499979 is an equidigital number, since it uses as much as digits as its factorization.

1259499979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16533720, while the sum is 64.

The square root of 1259499979 is about 35489.4347517680. The cubic root of 1259499979 is about 1079.9394053223.

The spelling of 1259499979 in words is "one billion, two hundred fifty-nine million, four hundred ninety-nine thousand, nine hundred seventy-nine".