1068947281 has 2 divisors, whose sum is σ = 1068947282. Its totient is φ = 1068947280.

The previous prime is 1068947261. The next prime is 1068947339. The reversal of 1068947281 is 1827498601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 964723600 + 104223681 = 31060^2 + 10209^2 .

It is a cyclic number.

It is not a de Polignac number, because 1068947281 - 2¹³ = 1068939089 is a prime.

It is a super-2 number, since 2×1068947281² = 2285296579114585922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1068947261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534473640 + 534473641.

It is an arithmetic number, because the mean of its divisors is an integer number (534473641).

Almost surely, 2^1068947281 is an apocalyptic number.

It is an amenable number.

1068947281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1068947281 is an equidigital number, since it uses as much as digits as its factorization.

1068947281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 1068947281 is about 32694.7592283534. The cubic root of 1068947281 is about 1022.4735816131.

It can be divided in two parts, 10689 and 47281, that added together give a triangular number (57970 = T₃₄₀).

The spelling of 1068947281 in words is "one billion, sixty-eight million, nine hundred forty-seven thousand, two hundred eighty-one".