855342769 has 2 divisors, whose sum is σ = 855342770. Its totient is φ = 855342768.

The previous prime is 855342689. The next prime is 855342821. The reversal of 855342769 is 967243558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 438693025 + 416649744 = 20945^2 + 20412^2 .

It is a cyclic number.

It is not a de Polignac number, because 855342769 - 2²⁵ = 821788337 is a prime.

It is a super-2 number, since 2×855342769² = 1463222504961174722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (855372769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427671384 + 427671385.

It is an arithmetic number, because the mean of its divisors is an integer number (427671385).

Almost surely, 2^855342769 is an apocalyptic number.

It is an amenable number.

855342769 is a deficient number, since it is larger than the sum of its proper divisors (1).

855342769 is an equidigital number, since it uses as much as digits as its factorization.

855342769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 49.

The square root of 855342769 is about 29246.2436733335. The cubic root of 855342769 is about 949.2488130085.

The spelling of 855342769 in words is "eight hundred fifty-five million, three hundred forty-two thousand, seven hundred sixty-nine".