855135799 has 6 divisors (see below), whose sum is σ = 994749864. Its totient is φ = 732973500.

The previous prime is 855135781. The next prime is 855135817. The reversal of 855135799 is 997531558.

It is an interprime number because it is at equal distance from previous prime (855135781) and next prime (855135817).

It is not a de Polignac number, because 855135799 - 2²¹ = 853038647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855135709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8725827 + ... + 8725924.

It is an arithmetic number, because the mean of its divisors is an integer number (165791644).

Almost surely, 2^855135799 is an apocalyptic number.

855135799 is a deficient number, since it is larger than the sum of its proper divisors (139614065).

855135799 is a wasteful number, since it uses less digits than its factorization.

855135799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17451765 (or 17451758 counting only the distinct ones).

The product of its digits is 1701000, while the sum is 52.

The square root of 855135799 is about 29242.7050561332. The cubic root of 855135799 is about 949.1722425845.

The spelling of 855135799 in words is "eight hundred fifty-five million, one hundred thirty-five thousand, seven hundred ninety-nine".