775869769 has 16 divisors (see below), whose sum is σ = 847211200. Its totient is φ = 708051456.

The previous prime is 775869727. The next prime is 775869781. The reversal of 775869769 is 967968577.

It is a cyclic number.

It is not a de Polignac number, because 775869769 - 2¹⁵ = 775837001 is a prime.

It is a super-2 number, since 2×775869769² = 1203947796896226722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 775869769.

It is not an unprimeable number, because it can be changed into a prime (775869709) 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 15 ways as a sum of consecutive naturals, for example, 53137 + ... + 66145.

It is an arithmetic number, because the mean of its divisors is an integer number (52950700).

Almost surely, 2^775869769 is an apocalyptic number.

It is an amenable number.

775869769 is a deficient number, since it is larger than the sum of its proper divisors (71341431).

775869769 is a wasteful number, since it uses less digits than its factorization.

775869769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13144.

The product of its digits is 40007520, while the sum is 64.

The square root of 775869769 is about 27854.4389460639. The cubic root of 775869769 is about 918.8887689939. Note that the first 3 decimals are identical.

The spelling of 775869769 in words is "seven hundred seventy-five million, eight hundred sixty-nine thousand, seven hundred sixty-nine".