1765665413 has 2 divisors, whose sum is σ = 1765665414. Its totient is φ = 1765665412.

The previous prime is 1765665397. The next prime is 1765665439. The reversal of 1765665413 is 3145665671.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1276061284 + 489604129 = 35722^2 + 22127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1765665413 - 2⁴ = 1765665397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1765665443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 882832706 + 882832707.

It is an arithmetic number, because the mean of its divisors is an integer number (882832707).

Almost surely, 2^1765665413 is an apocalyptic number.

It is an amenable number.

1765665413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1765665413 is an equidigital number, since it uses as much as digits as its factorization.

1765665413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 44.

The square root of 1765665413 is about 42019.8216678748. The cubic root of 1765665413 is about 1208.6562531924.

The spelling of 1765665413 in words is "one billion, seven hundred sixty-five million, six hundred sixty-five thousand, four hundred thirteen".