1305748897 has 2 divisors, whose sum is σ = 1305748898. Its totient is φ = 1305748896.

The previous prime is 1305748891. The next prime is 1305748979. The reversal of 1305748897 is 7988475031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 778633216 + 527115681 = 27904^2 + 22959^2 .

It is an emirp because it is prime and its reverse (7988475031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1305748897 - 2²³ = 1297360289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1305748891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652874448 + 652874449.

It is an arithmetic number, because the mean of its divisors is an integer number (652874449).

Almost surely, 2^1305748897 is an apocalyptic number.

It is an amenable number.

1305748897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305748897 is an equidigital number, since it uses as much as digits as its factorization.

1305748897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The square root of 1305748897 is about 36135.1476681637. The cubic root of 1305748897 is about 1092.9993136055. Note that the first 3 decimals are identical.

The spelling of 1305748897 in words is "one billion, three hundred five million, seven hundred forty-eight thousand, eight hundred ninety-seven".