3665209043 has 2 divisors, whose sum is σ = 3665209044. Its totient is φ = 3665209042.

The previous prime is 3665208977. The next prime is 3665209123. The reversal of 3665209043 is 3409025663.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3665209043 - 2¹⁶ = 3665143507 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 3665208988 and 3665209006.

It is not a weakly prime, because it can be changed into another prime (3665202043) 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, 1832604521 + 1832604522.

It is an arithmetic number, because the mean of its divisors is an integer number (1832604522).

Almost surely, 2^3665209043 is an apocalyptic number.

3665209043 is a deficient number, since it is larger than the sum of its proper divisors (1).

3665209043 is an equidigital number, since it uses as much as digits as its factorization.

3665209043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 38.

The square root of 3665209043 is about 60540.9699542384. The cubic root of 3665209043 is about 1541.8173074376.

The spelling of 3665209043 in words is "three billion, six hundred sixty-five million, two hundred nine thousand, forty-three".