860609 has 2 divisors, whose sum is σ = 860610. Its totient is φ = 860608.

The previous prime is 860599. The next prime is 860623. The reversal of 860609 is 906068.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529984 + 330625 = 728^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 860609 - 2⁴ = 860593 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (860689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430304 + 430305.

It is an arithmetic number, because the mean of its divisors is an integer number (430305).

2⁸⁶⁰⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

860609 is a deficient number, since it is larger than the sum of its proper divisors (1).

860609 is an equidigital number, since it uses as much as digits as its factorization.

860609 is an evil number, because the sum of its binary digits is even.

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

The square root of 860609 is about 927.6901422350. The cubic root of 860609 is about 95.1192961147.

The spelling of 860609 in words is "eight hundred sixty thousand, six hundred nine".