920665197169 has 9 divisors (see below), whose sum is σ = 923152228257. Its totient is φ = 918184856064.

The previous prime is 920665197167. The next prime is 920665197181. The reversal of 920665197169 is 961791566029.

The square root of 920665197169 is 959513.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 180569754225 + 740095442944 = 424935^2 + 860288^2 .

It is not a de Polignac number, because 920665197169 - 2¹ = 920665197167 is a prime.

It is a super-2 number, since 2×920665197169² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920665197167) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 430820269 + ... + 430822405.

Almost surely, 2^920665197169 is an apocalyptic number.

920665197169 is the 959513-rd square number.

920665197169 is the 479757-th centered octagonal number.

It is an amenable number.

920665197169 is a deficient number, since it is larger than the sum of its proper divisors (2487031088).

920665197169 is an frugal number, since it uses more digits than its factorization.

920665197169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5172 (or 2586 counting only the distinct ones).

The product of its (nonzero) digits is 11022480, while the sum is 61.

The spelling of 920665197169 in words is "nine hundred twenty billion, six hundred sixty-five million, one hundred ninety-seven thousand, one hundred sixty-nine".