1300561681 has 2 divisors, whose sum is σ = 1300561682. Its totient is φ = 1300561680.

The previous prime is 1300561673. The next prime is 1300561709. The reversal of 1300561681 is 1861650031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1184461056 + 116100625 = 34416^2 + 10775^2 .

It is an emirp because it is prime and its reverse (1861650031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1300561681 - 2³ = 1300561673 is a prime.

It is a super-2 number, since 2×1300561681² = 3382921372171091522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1300561601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650280840 + 650280841.

It is an arithmetic number, because the mean of its divisors is an integer number (650280841).

Almost surely, 2^1300561681 is an apocalyptic number.

It is an amenable number.

1300561681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1300561681 is an equidigital number, since it uses as much as digits as its factorization.

1300561681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1300561681 is about 36063.3010274989. The cubic root of 1300561681 is about 1091.5500436714.

The spelling of 1300561681 in words is "one billion, three hundred million, five hundred sixty-one thousand, six hundred eighty-one".