861293 has 2 divisors, whose sum is σ = 861294. Its totient is φ = 861292.

The previous prime is 861239. The next prime is 861299. The reversal of 861293 is 392168.

861293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (861239) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 643204 + 218089 = 802^2 + 467^2 .

It is a cyclic number.

It is not a de Polignac number, because 861293 - 2⁸ = 861037 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430646 + 430647.

It is an arithmetic number, because the mean of its divisors is an integer number (430647).

2⁸⁶¹²⁹³ is an apocalyptic number.

It is an amenable number.

861293 is a deficient number, since it is larger than the sum of its proper divisors (1).

861293 is an equidigital number, since it uses as much as digits as its factorization.

861293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 861293 is about 928.0587265901. The cubic root of 861293 is about 95.1444892704.

The spelling of 861293 in words is "eight hundred sixty-one thousand, two hundred ninety-three".