173285972698969 has 9 divisors (see below), whose sum is σ = 187641208997949. Its totient is φ = 159956124525600.

The previous prime is 173285972698939. The next prime is 173285972698973. The reversal of 173285972698969 is 969896279582371.

It is a happy number.

The square root of 173285972698969 is 13163813.

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 1628495015625 + 171657477683344 = 1276125^2 + 13101812^2 .

It is not a de Polignac number, because 173285972698969 - 2¹⁵ = 173285972666201 is a prime.

It is a super-2 number, since 2×173285972698969² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173285972698919) 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, 170623269 + ... + 171635869.

Almost surely, 2^{173285972698969} is an apocalyptic number.

173285972698969 is the 13163813-rd square number.

173285972698969 is the 6581907-th centered octagonal number.

It is an amenable number.

173285972698969 is a deficient number, since it is larger than the sum of its proper divisors (14355236298980).

173285972698969 is an frugal number, since it uses more digits than its factorization.

173285972698969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2025228 (or 1012614 counting only the distinct ones).

The product of its digits is 44442639360, while the sum is 91.

The spelling of 173285972698969 in words is "one hundred seventy-three trillion, two hundred eighty-five billion, nine hundred seventy-two million, six hundred ninety-eight thousand, nine hundred sixty-nine".