1280073569 has 2 divisors, whose sum is σ = 1280073570. Its totient is φ = 1280073568.

The previous prime is 1280073547. The next prime is 1280073581. The reversal of 1280073569 is 9653700821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 949379344 + 330694225 = 30812^2 + 18185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280073569 - 2²⁰ = 1279024993 is a prime.

It is a super-2 number, since 2×1280073569² = 3277176684104795522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1280073539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640036784 + 640036785.

It is an arithmetic number, because the mean of its divisors is an integer number (640036785).

Almost surely, 2^1280073569 is an apocalyptic number.

It is an amenable number.

1280073569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280073569 is an equidigital number, since it uses as much as digits as its factorization.

1280073569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 1280073569 is about 35778.1157832550. The cubic root of 1280073569 is about 1085.7878480092.

The spelling of 1280073569 in words is "one billion, two hundred eighty million, seventy-three thousand, five hundred sixty-nine".