855397 has 2 divisors, whose sum is σ = 855398. Its totient is φ = 855396.

The previous prime is 855391. The next prime is 855401. The reversal of 855397 is 793558.

855397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 690561 + 164836 = 831^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 855397 - 2⁷ = 855269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427698 + 427699.

It is an arithmetic number, because the mean of its divisors is an integer number (427699).

2⁸⁵⁵³⁹⁷ is an apocalyptic number.

It is an amenable number.

855397 is a deficient number, since it is larger than the sum of its proper divisors (1).

855397 is an equidigital number, since it uses as much as digits as its factorization.

855397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 37.

The square root of 855397 is about 924.8767485454. The cubic root of 855397 is about 94.9268874215.

The spelling of 855397 in words is "eight hundred fifty-five thousand, three hundred ninety-seven".