861013 has 2 divisors, whose sum is σ = 861014. Its totient is φ = 861012.

The previous prime is 861001. The next prime is 861019. The reversal of 861013 is 310168.

861013 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., 651249 + 209764 = 807^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 861013 - 2⁹ = 860501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (861019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430506 + 430507.

It is an arithmetic number, because the mean of its divisors is an integer number (430507).

2⁸⁶¹⁰¹³ is an apocalyptic number.

It is an amenable number.

861013 is a deficient number, since it is larger than the sum of its proper divisors (1).

861013 is an equidigital number, since it uses as much as digits as its factorization.

861013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 861013 is about 927.9078618053. The cubic root of 861013 is about 95.1341778958.

The spelling of 861013 in words is "eight hundred sixty-one thousand, thirteen".