855651847 has 2 divisors, whose sum is σ = 855651848. Its totient is φ = 855651846.

The previous prime is 855651829. The next prime is 855651851. The reversal of 855651847 is 748156558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855651847 - 2¹¹ = 855649799 is a prime.

It is a super-2 number, since 2×855651847² = 1464280166549022818, 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 855651847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855651817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427825923 + 427825924.

It is an arithmetic number, because the mean of its divisors is an integer number (427825924).

Almost surely, 2^855651847 is an apocalyptic number.

855651847 is a deficient number, since it is larger than the sum of its proper divisors (1).

855651847 is an equidigital number, since it uses as much as digits as its factorization.

855651847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344000, while the sum is 49.

The square root of 855651847 is about 29251.5272592731. The cubic root of 855651847 is about 949.3631362184.

The spelling of 855651847 in words is "eight hundred fifty-five million, six hundred fifty-one thousand, eight hundred forty-seven".