861797 has 2 divisors, whose sum is σ = 861798. Its totient is φ = 861796.

The previous prime is 861761. The next prime is 861799. The reversal of 861797 is 797168.

It is a happy number.

861797 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., 630436 + 231361 = 794^2 + 481^2 .

It is a cyclic number.

It is not a de Polignac number, because 861797 - 2⁶ = 861733 is a prime.

Together with 861799, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 861797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430898 + 430899.

It is an arithmetic number, because the mean of its divisors is an integer number (430899).

2⁸⁶¹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

861797 is a deficient number, since it is larger than the sum of its proper divisors (1).

861797 is an equidigital number, since it uses as much as digits as its factorization.

861797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 38.

The square root of 861797 is about 928.3302214191. The cubic root of 861797 is about 95.1630441146.

The spelling of 861797 in words is "eight hundred sixty-one thousand, seven hundred ninety-seven".