840693 has 32 divisors (see below), whose sum is σ = 1408000. Its totient is φ = 444528.

The previous prime is 840683. The next prime is 840703. The reversal of 840693 is 396048.

It is an interprime number because it is at equal distance from previous prime (840683) and next prime (840703).

It is not a de Polignac number, because 840693 - 2⁵ = 840661 is a prime.

It is a Duffinian number.

840693 is a modest number, since divided by 693 gives 84 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 840693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840643) 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 in 31 ways as a sum of consecutive naturals, for example, 19530 + ... + 19572.

It is an arithmetic number, because the mean of its divisors is an integer number (44000).

2⁸⁴⁰⁶⁹³ is an apocalyptic number.

It is an amenable number.

840693 is a deficient number, since it is larger than the sum of its proper divisors (567307).

840693 is a wasteful number, since it uses less digits than its factorization.

840693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 840693 is about 916.8931235428. The cubic root of 840693 is about 94.3798197910.

The spelling of 840693 in words is "eight hundred forty thousand, six hundred ninety-three".