855978341 has 2 divisors, whose sum is σ = 855978342. Its totient is φ = 855978340.

The previous prime is 855978337. The next prime is 855978359. The reversal of 855978341 is 143879558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 592727716 + 263250625 = 24346^2 + 16225^2 .

It is a cyclic number.

It is not a de Polignac number, because 855978341 - 2² = 855978337 is a prime.

It is a super-2 number, since 2×855978341² = 1465397840522224562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 855978341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855978301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427989170 + 427989171.

It is an arithmetic number, because the mean of its divisors is an integer number (427989171).

Almost surely, 2^855978341 is an apocalyptic number.

It is an amenable number.

855978341 is a deficient number, since it is larger than the sum of its proper divisors (1).

855978341 is an equidigital number, since it uses as much as digits as its factorization.

855978341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 50.

The square root of 855978341 is about 29257.1075296243. The cubic root of 855978341 is about 949.4838714422.

The spelling of 855978341 in words is "eight hundred fifty-five million, nine hundred seventy-eight thousand, three hundred forty-one".