840067 has 2 divisors, whose sum is σ = 840068. Its totient is φ = 840066.

The previous prime is 840061. The next prime is 840083. The reversal of 840067 is 760048.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 840067 - 2¹⁵ = 807299 is a prime.

It is not a weakly prime, because it can be changed into another prime (840061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420033 + 420034.

It is an arithmetic number, because the mean of its divisors is an integer number (420034).

2⁸⁴⁰⁰⁶⁷ is an apocalyptic number.

840067 is a deficient number, since it is larger than the sum of its proper divisors (1).

840067 is an equidigital number, since it uses as much as digits as its factorization.

840067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 840067 is about 916.5516897590. The cubic root of 840067 is about 94.3563881547.

The spelling of 840067 in words is "eight hundred forty thousand, sixty-seven".