129230903169 has 45 divisors (see below), whose sum is σ = 196666598227. Its totient is φ = 84568597776.

The previous prime is 129230903167. The next prime is 129230903171. The reversal of 129230903169 is 961309032921.

The square root of 129230903169 is 359487.

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

129230903169 is a `hidden beast` number, since 1 + 29 + 2 + 309 + 0 + 316 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (129230903167) and next prime (129230903171).

It can be written as a sum of positive squares in only one way, i.e., 128468480625 + 762422544 = 358425^2 + 27612^2 .

It is not a de Polignac number, because 129230903169 - 2¹ = 129230903167 is a prime.

It is a super-2 number, since 2×129230903169² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129230903167) 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 44 ways as a sum of consecutive naturals, for example, 190887259 + ... + 190887935.

Almost surely, 2^129230903169 is an apocalyptic number.

129230903169 is the 359487-th square number.

129230903169 is the 179744-th centered octagonal number.

It is an amenable number.

129230903169 is a deficient number, since it is larger than the sum of its proper divisors (67435695058).

129230903169 is an frugal number, since it uses more digits than its factorization.

129230903169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The spelling of 129230903169 in words is "one hundred twenty-nine billion, two hundred thirty million, nine hundred three thousand, one hundred sixty-nine".