840713 has 2 divisors, whose sum is σ = 840714. Its totient is φ = 840712.

The previous prime is 840709. The next prime is 840727. The reversal of 840713 is 317048.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 797449 + 43264 = 893^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 840713 - 2² = 840709 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (840703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420356 + 420357.

It is an arithmetic number, because the mean of its divisors is an integer number (420357).

2⁸⁴⁰⁷¹³ is an apocalyptic number.

It is an amenable number.

840713 is a deficient number, since it is larger than the sum of its proper divisors (1).

840713 is an equidigital number, since it uses as much as digits as its factorization.

840713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 840713 is about 916.9040298744. The cubic root of 840713 is about 94.3805682138.

The spelling of 840713 in words is "eight hundred forty thousand, seven hundred thirteen".