143649338121 has 9 divisors (see below), whose sum is σ = 207495130791. Its totient is φ = 95765467392.

The previous prime is 143649338099. The next prime is 143649338141. The reversal of 143649338121 is 121833946341.

The square root of 143649338121 is 379011.

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

143649338121 is a `hidden beast` number, since 1 + 4 + 3 + 6 + 493 + 38 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 129740438025 + 13908900096 = 360195^2 + 117936^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 143649338121 - 2⁹ = 143649337609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (143649338141) 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 8 ways as a sum of consecutive naturals, for example, 1073865 + ... + 1200201.

Almost surely, 2^143649338121 is an apocalyptic number.

143649338121 is the 379011-st square number.

143649338121 is the 189506-th centered octagonal number.

It is an amenable number.

143649338121 is a deficient number, since it is larger than the sum of its proper divisors (63845792670).

143649338121 is an frugal number, since it uses more digits than its factorization.

143649338121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252680 (or 126340 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The spelling of 143649338121 in words is "one hundred forty-three billion, six hundred forty-nine million, three hundred thirty-eight thousand, one hundred twenty-one".