775165969 has 8 divisors (see below), whose sum is σ = 817027560. Its totient is φ = 734313216.

The previous prime is 775165913. The next prime is 775165981. The reversal of 775165969 is 969561577.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 276224400 + 498941569 = 16620^2 + 22337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 775165969 - 2¹⁵ = 775133201 is a prime.

It is a super-2 number, since 2×775165969² = 1201764558991417922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (775163969) 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 in 7 ways as a sum of consecutive naturals, for example, 250632 + ... + 253705.

It is an arithmetic number, because the mean of its divisors is an integer number (102128445).

Almost surely, 2^775165969 is an apocalyptic number.

It is an amenable number.

775165969 is a deficient number, since it is larger than the sum of its proper divisors (41861591).

775165969 is a wasteful number, since it uses less digits than its factorization.

775165969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504419.

The product of its digits is 3572100, while the sum is 55.

The square root of 775165969 is about 27841.8025458123. The cubic root of 775165969 is about 918.6108402370.

The spelling of 775165969 in words is "seven hundred seventy-five million, one hundred sixty-five thousand, nine hundred sixty-nine".