855530971 has 2 divisors, whose sum is σ = 855530972. Its totient is φ = 855530970.

The previous prime is 855530957. The next prime is 855530987. The reversal of 855530971 is 179035558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855530971 - 2²⁵ = 821976539 is a prime.

It is not a weakly prime, because it can be changed into another prime (855530941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427765485 + 427765486.

It is an arithmetic number, because the mean of its divisors is an integer number (427765486).

Almost surely, 2^855530971 is an apocalyptic number.

855530971 is a deficient number, since it is larger than the sum of its proper divisors (1).

855530971 is an equidigital number, since it uses as much as digits as its factorization.

855530971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 43.

The square root of 855530971 is about 29249.4610377696. The cubic root of 855530971 is about 949.3184293192.

The spelling of 855530971 in words is "eight hundred fifty-five million, five hundred thirty thousand, nine hundred seventy-one".