865540411 has 2 divisors, whose sum is σ = 865540412. Its totient is φ = 865540410.

The previous prime is 865540387. The next prime is 865540427. The reversal of 865540411 is 114045568.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 865540411 - 2¹³ = 865532219 is a prime.

It is not a weakly prime, because it can be changed into another prime (865540471) 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, 432770205 + 432770206.

It is an arithmetic number, because the mean of its divisors is an integer number (432770206).

Almost surely, 2^865540411 is an apocalyptic number.

865540411 is a deficient number, since it is larger than the sum of its proper divisors (1).

865540411 is an equidigital number, since it uses as much as digits as its factorization.

865540411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 865540411 is about 29420.0681678340. The cubic root of 865540411 is about 953.0063252275.

Adding to 865540411 its reverse (114045568), we get a palindrome (979585979).

The spelling of 865540411 in words is "eight hundred sixty-five million, five hundred forty thousand, four hundred eleven".