865852147 has 2 divisors, whose sum is σ = 865852148. Its totient is φ = 865852146.

The previous prime is 865852129. The next prime is 865852153. The reversal of 865852147 is 741258568.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865852147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 865852097 and 865852106.

It is not a weakly prime, because it can be changed into another prime (865852157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432926073 + 432926074.

It is an arithmetic number, because the mean of its divisors is an integer number (432926074).

Almost surely, 2^865852147 is an apocalyptic number.

865852147 is a deficient number, since it is larger than the sum of its proper divisors (1).

865852147 is an equidigital number, since it uses as much as digits as its factorization.

865852147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 537600, while the sum is 46.

The square root of 865852147 is about 29425.3657071582. The cubic root of 865852147 is about 953.1207241689.

It can be divided in two parts, 8658521 and 47, that added together give a palindrome (8658568).

The spelling of 865852147 in words is "eight hundred sixty-five million, eight hundred fifty-two thousand, one hundred forty-seven".