851393 has 2 divisors, whose sum is σ = 851394. Its totient is φ = 851392.

The previous prime is 851387. The next prime is 851401. The reversal of 851393 is 393158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 753424 + 97969 = 868^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 851393 - 2¹⁶ = 785857 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 851393.

It is not a weakly prime, because it can be changed into another prime (851303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425696 + 425697.

It is an arithmetic number, because the mean of its divisors is an integer number (425697).

2⁸⁵¹³⁹³ is an apocalyptic number.

It is an amenable number.

851393 is a deficient number, since it is larger than the sum of its proper divisors (1).

851393 is an equidigital number, since it uses as much as digits as its factorization.

851393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 851393 is about 922.7095967855. The cubic root of 851393 is about 94.7785423255.

The spelling of 851393 in words is "eight hundred fifty-one thousand, three hundred ninety-three".