855606431 has 2 divisors, whose sum is σ = 855606432. Its totient is φ = 855606430.

The previous prime is 855606391. The next prime is 855606439. The reversal of 855606431 is 134606558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855606431 - 2¹⁰ = 855605407 is a prime.

It is a super-2 number, since 2×855606431² = 1464124729537115522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855606439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427803215 + 427803216.

It is an arithmetic number, because the mean of its divisors is an integer number (427803216).

Almost surely, 2^855606431 is an apocalyptic number.

855606431 is a deficient number, since it is larger than the sum of its proper divisors (1).

855606431 is an equidigital number, since it uses as much as digits as its factorization.

855606431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 855606431 is about 29250.7509476253. The cubic root of 855606431 is about 949.3463392624.

The spelling of 855606431 in words is "eight hundred fifty-five million, six hundred six thousand, four hundred thirty-one".