1606797281 has 2 divisors, whose sum is σ = 1606797282. Its totient is φ = 1606797280.

The previous prime is 1606797253. The next prime is 1606797289. The reversal of 1606797281 is 1827976061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1606727056 + 70225 = 40084^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606797281 - 2²² = 1602602977 is a prime.

It is a super-2 number, since 2×1606797281² = 5163595004457985922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1606797289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803398640 + 803398641.

It is an arithmetic number, because the mean of its divisors is an integer number (803398641).

Almost surely, 2^1606797281 is an apocalyptic number.

It is an amenable number.

1606797281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606797281 is an equidigital number, since it uses as much as digits as its factorization.

1606797281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 1606797281 is about 40084.8759633855. The cubic root of 1606797281 is about 1171.2610361968.

The spelling of 1606797281 in words is "one billion, six hundred six million, seven hundred ninety-seven thousand, two hundred eighty-one".