1865067649 has 2 divisors, whose sum is σ = 1865067650. Its totient is φ = 1865067648.

The previous prime is 1865067643. The next prime is 1865067709. The reversal of 1865067649 is 9467605681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1282714225 + 582353424 = 35815^2 + 24132^2 .

It is a cyclic number.

It is not a de Polignac number, because 1865067649 - 2⁹ = 1865067137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1865067596 and 1865067605.

It is not a weakly prime, because it can be changed into another prime (1865067643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932533824 + 932533825.

It is an arithmetic number, because the mean of its divisors is an integer number (932533825).

Almost surely, 2^1865067649 is an apocalyptic number.

It is an amenable number.

1865067649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1865067649 is an equidigital number, since it uses as much as digits as its factorization.

1865067649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 1865067649 is about 43186.4289910615. The cubic root of 1865067649 is about 1230.9248225624.

The spelling of 1865067649 in words is "one billion, eight hundred sixty-five million, sixty-seven thousand, six hundred forty-nine".