855905311 has 2 divisors, whose sum is σ = 855905312. Its totient is φ = 855905310.

The previous prime is 855905291. The next prime is 855905317. The reversal of 855905311 is 113509558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855905311 - 2²¹ = 853808159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855905317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427952655 + 427952656.

It is an arithmetic number, because the mean of its divisors is an integer number (427952656).

Almost surely, 2^855905311 is an apocalyptic number.

855905311 is a deficient number, since it is larger than the sum of its proper divisors (1).

855905311 is an equidigital number, since it uses as much as digits as its factorization.

855905311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 37.

The square root of 855905311 is about 29255.8594302065. The cubic root of 855905311 is about 949.4568681191.

The spelling of 855905311 in words is "eight hundred fifty-five million, nine hundred five thousand, three hundred eleven".