868019 has 2 divisors, whose sum is σ = 868020. Its totient is φ = 868018.

The previous prime is 867991. The next prime is 868033. The reversal of 868019 is 910868.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868019 is a prime.

It is a super-2 number, since 2×868019² = 1506913968722, which contains 22 as substring.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (868039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434009 + 434010.

It is an arithmetic number, because the mean of its divisors is an integer number (434010).

2⁸⁶⁸⁰¹⁹ is an apocalyptic number.

868019 is a deficient number, since it is larger than the sum of its proper divisors (1).

868019 is an equidigital number, since it uses as much as digits as its factorization.

868019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 868019 is about 931.6753726486. The cubic root of 868019 is about 95.3915144660.

Subtracting 868019 from its reverse (910868), we obtain a square (42849 = 207²).

The spelling of 868019 in words is "eight hundred sixty-eight thousand, nineteen".