855818693 has 2 divisors, whose sum is σ = 855818694. Its totient is φ = 855818692.

The previous prime is 855818687. The next prime is 855818699. The reversal of 855818693 is 396818558.

It is a balanced prime because it is at equal distance from previous prime (855818687) and next prime (855818699).

It can be written as a sum of positive squares in only one way, i.e., 848964769 + 6853924 = 29137^2 + 2618^2 .

It is a cyclic number.

It is not a de Polignac number, because 855818693 - 2¹⁴ = 855802309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855818699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427909346 + 427909347.

It is an arithmetic number, because the mean of its divisors is an integer number (427909347).

Almost surely, 2^855818693 is an apocalyptic number.

It is an amenable number.

855818693 is a deficient number, since it is larger than the sum of its proper divisors (1).

855818693 is an equidigital number, since it uses as much as digits as its factorization.

855818693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2073600, while the sum is 53.

The square root of 855818693 is about 29254.3790397267. The cubic root of 855818693 is about 949.4248385521.

The spelling of 855818693 in words is "eight hundred fifty-five million, eight hundred eighteen thousand, six hundred ninety-three".