855069391 has 16 divisors (see below), whose sum is σ = 971250336. Its totient is φ = 745920000.

The previous prime is 855069389. The next prime is 855069433. The reversal of 855069391 is 193960558.

It is a cyclic number.

It is not a de Polignac number, because 855069391 - 2¹ = 855069389 is a prime.

It is a super-2 number, since 2×855069391² = 1462287326850221762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855061391) 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 in 15 ways as a sum of consecutive naturals, for example, 11971 + ... + 43051.

It is an arithmetic number, because the mean of its divisors is an integer number (60703146).

Almost surely, 2^855069391 is an apocalyptic number.

855069391 is a deficient number, since it is larger than the sum of its proper divisors (116180945).

855069391 is a wasteful number, since it uses less digits than its factorization.

855069391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31194.

The product of its (nonzero) digits is 291600, while the sum is 46.

The square root of 855069391 is about 29241.5695714166. The cubic root of 855069391 is about 949.1476717260.

The spelling of 855069391 in words is "eight hundred fifty-five million, sixty-nine thousand, three hundred ninety-one".