865151801 has 2 divisors, whose sum is σ = 865151802. Its totient is φ = 865151800.

The previous prime is 865151789. The next prime is 865151803. The reversal of 865151801 is 108151568.

865151801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 627252025 + 237899776 = 25045^2 + 15424^2 .

It is a cyclic number.

It is not a de Polignac number, because 865151801 - 2¹⁰ = 865150777 is a prime.

Together with 865151803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (865151803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432575900 + 432575901.

It is an arithmetic number, because the mean of its divisors is an integer number (432575901).

Almost surely, 2^865151801 is an apocalyptic number.

It is an amenable number.

865151801 is a deficient number, since it is larger than the sum of its proper divisors (1).

865151801 is an equidigital number, since it uses as much as digits as its factorization.

865151801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 35.

The square root of 865151801 is about 29413.4629209143. The cubic root of 865151801 is about 952.8636770725.

The spelling of 865151801 in words is "eight hundred sixty-five million, one hundred fifty-one thousand, eight hundred one".