865795157 has 2 divisors, whose sum is σ = 865795158. Its totient is φ = 865795156.

The previous prime is 865795123. The next prime is 865795243. The reversal of 865795157 is 751597568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 856498756 + 9296401 = 29266^2 + 3049^2 .

It is a cyclic number.

It is not a de Polignac number, because 865795157 - 2⁸ = 865794901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 865795099 and 865795108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (865795457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432897578 + 432897579.

It is an arithmetic number, because the mean of its divisors is an integer number (432897579).

Almost surely, 2^865795157 is an apocalyptic number.

It is an amenable number.

865795157 is a deficient number, since it is larger than the sum of its proper divisors (1).

865795157 is an equidigital number, since it uses as much as digits as its factorization.

865795157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646000, while the sum is 53.

The square root of 865795157 is about 29424.3973090359. The cubic root of 865795157 is about 953.0998123839.

The spelling of 865795157 in words is "eight hundred sixty-five million, seven hundred ninety-five thousand, one hundred fifty-seven".