1305748979 has 2 divisors, whose sum is σ = 1305748980. Its totient is φ = 1305748978.

The previous prime is 1305748897. The next prime is 1305749057. The reversal of 1305748979 is 9798475031.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305748979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1305748979.

It is not a weakly prime, because it can be changed into another prime (1305748579) 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, 652874489 + 652874490.

It is an arithmetic number, because the mean of its divisors is an integer number (652874490).

Almost surely, 2^1305748979 is an apocalyptic number.

1305748979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305748979 is an equidigital number, since it uses as much as digits as its factorization.

1305748979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The square root of 1305748979 is about 36135.1488027931. The cubic root of 1305748979 is about 1092.9993364853. Note that the first 3 decimals are identical.

The spelling of 1305748979 in words is "one billion, three hundred five million, seven hundred forty-eight thousand, nine hundred seventy-nine".